Let's face it, we've all emulated at some point.
Right now, make a rough count of all your game ROM files (if possible) and tell us how many you have, including cases where you've ripped a game you actually own.
I count 1071 over seven different platforms; I've got a near-complete collection of NES games and at present my other consoles' collections are quite small (though I did have full SNES, Mega Drive, Master System and Game Boy at one point).
The ones I play most:
FFIII on the NES (fan-translated, natch)
Sonic 2 on the Mega Drive (even though I actually own it, but there's this neat tool that lets you change the music)
Awful Fantasy III (a parody of FFVI for the SNES by somethingawful, still occasionally gets a bit of a chuckle out of me)