mate I'm not far off 26, and I do the same sort of stuff I did when I was 18. Most people at uni know Im a bit older than them but they get surprised when they find my actual age, I think looks wise I look between 22-24
I think there might be some people I knew back home who look down on me for being 25 and only in my 2nd year of uni, when "by this age" I should have achieved various things, wife, car, house, career...well I haven't got any of them and wouldn't have it any other way.
One of my mates has turned 23 and decided he's "too old" for going out any more, thats like life over! I reckon when I'm in my 30s I'll still be doing the same thing, going out, going to gigs, watching sports, mucking about on the playstation, going to the gym, talking crap into the night with cans of beer and chinese takeaways, blabbering away on msn....at the end of the day you only grow old if you fall for societys pressure to conform
I also reckon I look a lot younger than peers of my own age, I think the stresses of career and marriage age them a lot faster than being a student bum does me