Ha, i joined this forum when i was 19 and i am now 24.
TBH life is great for me right now, i'll be finishing college in a few weeks and the whole course has gone really well. I have bought a new house (although still waiting for the contract of exchange -_- ) and will be moving to a new area soon (Southampton) and i am really looking forward to it ^_^v .
I also feel like i look really good right now- most people seem to look about 19 years old (still getting ID'd too lol) and despite the inevitable changes in metabolism that happen as you grow older, i have managed to keep my figure slim & good ^_^ .
I'm getting more done in life than i ever have done, and despite the Year of the Tiger being a year of a LOT of adversities for me, i am looking forwards towards the future. With adversity comes new opportunities- the glass is half full ^o^ !
I was really gutted when i first 20, and for the next couple of years i felt depressed and in a rut (didn't feel like i was doing anything meaningful). But i picked myself up at the age of 23 and the age of 23 turned out to be the best age i have lived so far (even better than the age of 19, and possibly even 16); i went on an awesome holiday to America, i started college, and i sorted out lots of issues in general- and i'm hoping that the age of 24 will be an even better age to be (thinkings are really looking up right now) ^_^v !
A lot of people go on & on about your teenage years, always saying stuff like how they are the best years of your life etc (people in Japan seem to be particularly obsessed with teenage years -_- ). But they don't have to be. The teenage years are just the start, and if you play your cards right and be proactive with a positive attitude, then you will have many even better years to come. Your 20's is really the start to your life

!
I don't mind growing older at all right now. Sure, i might feel differently when i turn 30- who knows. But i am who i am and i'm not going to be someone i'm not just because others may except it of me. So what if you still like jpop, beads, anime & stickers- age is just a number, be who you want to be! Life your life proactively and you won't regret wasting your years!
As long as i don't age prematurely, then i don't mind growing older at all ^_^v .