I was 5 when my dad bought a C-64 (very popular in Finland), I knew how to read so I pored through the manuals and messed around with that box. An A500 came in the summer of 1989, when I was 9. It was the logical upgrade path from the C-64, so I guess that's why.
What did I do with it? Deluxe Paint, ASM-One, JR-Comm, Terminus, Protracker, X-Copy, SuperDuper, RSI Demomaker, watched loads of demos, diskmags, music disks, slide shows and played various games.
What I use: A4000, A3000, A1200, A500. Mainly for archiving old scene productions for Break's and Zeg's databases.
Oh yeah and I'm 29 for a few more months.. ;-)