Consoles I Own: GameBoy (yellow), GameBoy Pocket (silver), GameBoy Colour (x2 - cosmic purple & Pikachu Special Edition), GameBoy Advance (clear purple), GameBoy Advance SP (x2 - one has a broken light and both are silver), GameBoy Micro (emerald green), Nintendo DS Phat (silver), DS Lite (white), DSi XL (chocolate brown), Sony PSP 3003 (turquoise), Wii (black).
My dad owns a Nintendo 64, a Commodore Amiga and a PSOne.
Consoles I Use The Most: Until I got my DSi XL, it would have been my DS Lite, with the Phat used to trade Pokémon, etc. Now it's my DSi XL and my PSP 3003. I've clocked something like 150 hours of gameplay on the XL since April, and around 20 hours on the PSP since I got it last week. I only use my Wii occasionally, because of how my room is set up, but when I do I do big long jaunts on Little King's Story for four hours or more. Plus, I'm a pocket gamer through and through. :3
ETA - Ohhh yes, Jeremy reminded me! I also have a Sega GameGear. xD And we used to own a CD-i, back when I was a kid. Yep, I have played that Zelda game.