me too

granted I now live in a place where proprietors could care less about that, but back in TO at 35 I never went out w/o ID just for that reason...well, that and drink

Fuck yeah to looking under 25, I got carded any time I went somewhere new
For real, your 30s and 40s (and beyond) are nothing to be afraid of. Eat healthily, work out every day, enjoy your life, enjoy your body, laugh every day and you'll be criss. Don't be scared of time, it shows and teaches you awesome things and you can still look and feel amazing if you don't resign yourself to being over some arbitrary 'hill'.
Looking back on my 20's I was so insecure, I knew who I wanted to be and what I wanted to accomplish but it all seemed so nebulous and my approach was always so fucking tentative. Now though, fuck that. I'm much more financially (and psychologically) established and energetic and I go for what I want, no holds barred. There's a confidence and enjoyment of life that comes with experience, looking back I wouldn't wish to be 20 again for anything. Yeah it was fun at the time, I just had no idea how much more wicked life could get as the years went by.
30 need not be old, 40 need not be old, hell 50 need not be old. It's all in where your head is at and how you treat your body.