With your mouth?
I'm going to be the second person to vote for the PS3. I own the 60GB version and it plays the older games that I desperately love to play...and it's also the system for fighting games, something I tend to play quite a bit. The DS would be a distant second...if they kept releasing killer Sonic games for it, than it'd be by and far the first. The Wii was okay at first but once the novelty wore off, I realized I didn't really like many of the games coming out and having a 250 dollar system only for perhaps Brawl seemed like a bad idea.
The DS as it is the only one I have.
I voted DS because it's the only one that has games I'm interested in playing. There's a good handful of games coming out now (Ninja Gaiden, Nanostray 2) and in the future (Super Dodgeball, Space Invaders Extreme, Bangai-O, N+, Metal Slug 7) that I am quite looking forward to playing. It's also the only choice on the list that I own lol (don't quite have a gaming computer).
I guess I'm just not an hrdk0re of a gamer.
360 for me...I have a DS but I think I've only played with it once
*shrug*