Oh, nevermind then. :P I wouldn't say a couple of months fit under "short term" and besides , I've changed my username, avatar and everything meanwhile.
I don't have full responsibilities yet, as I still live with my parents, but it's still a lot more than a few years ago. The main difference is that I actually have to do things in college (high school was really easy for me), which is something that's hard to get used to. It's better that you're thinking about everything now already, then you can add a bit of responsibility step by step instead of the whole thing at once.
I've seen you around PT, you're definitely not going unnoticed. Some of the games are simple "post-something-without-thinking" games, like Raichu, use Thunder!, but if you really want to interact with others I can recommend you the chatting threads Watch out for Ghosts! (you can even get yourself some nice emblems here) and The Bulbasaur Race.
It does feel like a second home, eh? Sometimes I even have the feeling it's more like home than the real world. xD
I don't think it has changed a lot, new people appeared, old people left, same for moderators. It flows on. Over the past year, The Underground has appeared, The World of PC too, but died down again, the Club sections have been discarded (their threads are now spread over the rest of the forums) and some sections got a small makeover.