Well, as a member of the site, I haven't changed aside from becoming a Super Moderator (which is a pretty massive change, I know). I believe I've always used proper grammar and spelling, I've always followed the rules, and I've always been around in Fan Creations... Which was pretty much all I ever was as a member, just someone who got involved in discussions I liked and drew Pokémon and showed them to the other members. Of course my role is much larger now - I contribute artwork to the site, I assist in moderation of the site, and I can work on things moderators work on.
This site has really changed me as an artist more than as a member. (I guess if you count being an artist as part of being a member, then it has changed me a lot.) It's pushed me to do so much more than I would have had I not joined, and I've learned so much - I've tried countless styles, gotten so much better at Sugimori-style, my ability to do digital art has increased an insane amount, and I feel like I have a decent grip on some helpful techniques that may assist me in the future. All thanks to those who supported me (and those who were against me) - I couldn't have done it without you. ;D
Edit: Oh yeah, I don't think I've changed my usertitle at all / in a very long time. It may have been "Arceus Freak" at one point, but it's been "Disappear to a place beyon seeing..." for quite some time now. So that hasn't changed, either.