Exactly 150 unique games, not counting emulated, Virtual Console, or duplicate games (I have 6 VC games, 4 of which are NES games, and the remaining two are SNES games)
Here's the breakdown:
Super NES: 34 (22 bought new, 12 bought used; 3 of these games are actually my brother's, but I counted them anyway
because he never plays them anymore, and they reside in my room.)
Sega Genesis: 11 (all but one [Sonic & Knuckles] were bought new; 6 of these games are my brother's)
Nintendo 64: 29 (13 new, 16 used)
Sega Dreamcast: 3 (all new)
Nintendo GameCube: 18 (15 new, 3 used; 2 are my brother's)
NES: 9 (all used)
Wii: 12 (all new)
Sony PlayStation: 1 (my dad found the system--with one controller, a memory card, and a Mega Man 8 disc--next to a
dumpster, of all places...)
Game Boy (Pocket): 8 (4 new, 4 used; extra copy of Pokémon Blue not counted)
Game Boy Color: 3 (2 new, 1 used)
Game Boy Advance: 11 (9 new, 2 used)
Nintendo DS: 10 (all new)
Nintendo 3DS: 1 (Mario Kart 7; new, of course)