I'm 23. Seems there's quite a few people of that age here.
My bro is 30 but I look almost as old as him, which is weird. Well, at least I don't have to manage a language center like him... I swear I'd look 70 within a week.
I was 15 or 16 when I got into DMC, starting with DMC3. Then did DMC1, and DMC4. Last was DMC2. I guess I can relate to people of my age... they grew up with the same media, similar ideas, etc etc.