Saying someone changed is in my opinion very drastic. I think that would imply someone dropped their previous character entirely and turned a new leaf.
Have I changed? I might have, but it's not something that I would notice. I think I grew however. I think I am a better person than any past version of me.
What I mean by this, is that every version of me that led to the current one, is responsible for what I am today. A year long combination of good and bad traits, coupled with experience and consequences of both.
Does my ego still cause problems?
From what I know and see, it doesn't. I'm still a strong character, but I'm no longer unwilling to accept my mistakes, or take criticism.
How will I act when I'm punished by the administration?
Well hopefully it won't come to that. I respect order, and I follow rules. In the event I do still manage to make a mistake, I'll be mature enough to listen to staff input and act accordingly.
Would I describe myself as insensitive and with no filter/capable of making offensive jokes?
I wouldn't describe myself as such. I still make jokes, but they're harmless.