Well personally I thought I would never make a list of favourite members, and I still wont. I just feel like writing about some people I remember for special things.
Mex - Being probably my closest friend on Argonath for a long time, till you left. One of my first friends, taught me RP. For our good times scripting together, stunting(also grind) and driving around in Turismo on SA:MP blowing weed smoke into my face when I tried to ticket you as a cop.
[NS]Mary - First person I ever met on Argonath MTA:VC. Helped me learning basics and gave me interest of getting into [NS].
Watti - Wattineese, always a good wordpuzzle if I was bored. Had your funny moments. Too bad it ended wrong
Hess - Our funny RP together on MTA:VC, with the hideout as criminal, but also as cops sometimes. Scripting together.
BiteMe - Good roleplay. You are one of the great guys from [NS] that I will always remember.
Lionz - Another guy from [NS]. You were a part of our little circle (Me, you, BiteMe and Hess). Jumping onto VCPD roof and owning cops. Funny RP on SA:MP as gangster.
xcasio - First friend I met on SA:MP. Good times in casino and spamming each other "Join NS" "Join AV"

Telling Mex that you would persuade me to only play SA:MP. Later on a funny granny, and ofcourse the chineese you speak with Inkognito on CBradio. Special MSN conversations (check MSN funny chatlogs to see what I mean) and making joke about CBradio on MTA:VC "!cb this is our secret channel"
RON - Being a good friend I can always count on. Funny jokes both ingame and on MSN. Calling Mex a pussy after he beat you in DD. Good MSN conversations talking about a lot of stuff, when I needed to stress off a bit. Like an older brother to me.
Ronnel - Great friend, wise and a good guy. Feel like I can talk to you about anything, doing great deal of work for the community.
Sauron - Doing a great job. Making fun on MTA:VC server with your S:P smiley. Great comments like "Who are you calling a bot? S:P" when I was a newb and insisted you were a bot. When we spoke about iPod on server and you did a comment "eyepod? S:P". Always great timing
Kojak - Great friend, easy to like. Always polite and helped me through a lot of things. Picked me as moderator for SA:MP and helped me every time I had questions. Hope you will visit server soon.
Jubin - Old friend. You did a good job as admin coordinator for MTA:VC, and I remember the time where you guided me to become admin. Talks about history and other things. Special sense of humor, but often very funny.
Ghost - Good old times on MTA:VC with sailor training and police work. Always screaming "SHOOT HIM" or "GET HIM" on Teamspeak as police. Funny times developing VC:MP server.
Carhartt - One of the first friends I got on SA:MP. Always been a good friend, and I respect you very much as a good RPer and friend. Love your signatures, and will remember our old buisness "p!xel studios" or whatever it was called
Merc - Best gangster roleplayer I ever met. Enjoyed every second roleplaying with you. You are a great friend, and I respect you a lot.
Austin - Remember you from the times patrolling LS. First guy who ever proposed to me.
MIB - Good times together on MTA:VC. Respect you a lot. You have been a great friend and have been the best Co-Leader ever.
Cutter - Remember you for the friendship. Even after I resigned from MTA you have supported me and always made me feel good whenever I visited.
Miami - I will specially remember you for our weird long smileys ;:*;-,.:;':,:')))
Hank_Rafferty - Always been a great friend. One of the best RP'ers around on Argonath, and a great driver, shooter and chief. Will remember the training we did when I was ARPD Cadet and our off-duty RP

Specially when I RP'ed a gangsta always annoying you when you were off duty.
Tiderman - Great friend and good roleplayer. Always liked you.
Agent - A good friend. Always helped me out in situations when I asked for help. Great guy and now a soldier I hear
Kaltsu - What can I say? Banana phone. Funny and nice guy. Will always remember your singing on Teamspeak.
Rusty - Great friend, that's all I can say about you.
Trobby - Driving across whole Vice City on a Pizzaboy while being wanted was funny
Arto - Getting pissed off at me because he couldnt catch me as cop, when I was on my pizzaboy
Shifter - Great guy, liked you from the first moment I met you
Trix - Good friend, and skilled cop. Driving around with gamepad, talking and having fun.
DeeJay - Great swedish friend. Enjoyed every second with you, having fun and drifting around in LS.
Charus - Will specially remember you for your good comments. Remember once patrolling and we saw a guy on the ground who was hurt. You said "There are two ways to solve this problem. A bullet in the forehead would be the easiest."
Wdoyle - Great friend. Good humor and enjoy every moment with you.
Grzesiek - Our good, drunk, RP on MTA:VC. Stealing vodka from mall

When I was a newbie and was about to do my first DD I asked "what is this? What are the rules?" you said "Rules are: No ramming". Since then people used that comment often
GiacJr - Always funny humor and the comment most of times when I join server "Hey sexy<33"
Heat - Actually a good guy when you get to know him. Short temper but can be really funny.
[NS]Candy - Good times together on server and MSN as well as other chats. Enjoyed it.
Claire - Very good friend. Too bad you are not much around anymore. Had some funny moments with you, and enjoyed roleplaying your littlebrother.
Watahell - Asshat. Always had fun with you, and enjoyed playing when you were on.
Aero - First guy on MTA I could ever talk G' language with, when the others didn't understand anything of it. Funny.
Jingle - For the nickname "Kinky" and the funny jokes we have had.
Mango - For speaking danish even though you never really got lessons in it. Being super clever and beating us all in quiz.
All TeaM members - Sorry cant write all your names down right now. Has been an awesome time, and hope it will continue. You all are great <3
All MTA guys - Sorry can't write all your names right now. There is so much to say but I am really tired right now. I will always remember all the great friends and fellowship. You all know who you are
Admins & developer team - You all are great to work with, I'm really enjoying it. Keep up the work.
There is no order in this at all. At start I wanted to order it after which persons I met first, but after a few people I couldnt actually be bothered sorting out all those names

This post is not really "favourite members" its more like the members I had some special moments with, and got history with. I probably missed quite a bunch that I do have some history with, but my brain isnt really working anymore for now (it's 3:04 am and havent slept much previous nights).
Names and moments keep popping up, but I have to stop somewhere. This list took me about an hour to make.
If you are not on this list, it does not necessarily mean you are not my friend. Either I forgot adding you, or we just never had any special moments or a lot of history.
I'm glad to have so much friends on Argonath.