No Bugrimmar, you're really not crazy. Here's my history:
Playstation: Bought for Wipeout 3 and Gran Turismo, found out there were other games in existence about a year later ;p
Gameboy Colour: Got just for the glory of Pokemon Gold. Never owned another GBC game.
Playstation 2: Bought for, um, Wipeout Fusion and Gran Turismo 3...turned out to be the best console ever, must have played over 100 PS2 games and owned at least 50.
Gameboy Advance: I got it for Pokemon Ruby/Sapphire, but I managed to branch out more than the GBC, and not just to Pokemon Leaf Green, but also for Yoshi's Island and Rayman 3 (both stone-cold classics).
Gamecube: I bought one just for Pokemon Collosseum- yes, I'm Pokemon's bitch. I also played and hated Super Mario Sunshine and a couple other games.
DS: Bought because I knew it would one day have a new Pokemon and I wanted to get in early to make sure.
Wii: Bought because Wii Sports + the Wiimote looked awesome (and Pokemon Battle Revolution looked good too...)
PS3: Bought for Wipeout HD. This was the hardest of all because I hated Sony and everything that they did with the PS3 for so long, but I cant resist Wipeout. Also looking forward to (suprise suprise) Gran Turismo 5.
So there, my lunatic fanboyism for three series basically drove me to buy 8 consoles.