I like my Xbox 360.
I mainly use my computer for Indi games, for example, this and Minecraft.
But it's also obviously, the only such thing for PC-Only games, like Spore and Rollercoaster Tycoon. :3
I have bought a few games for both Console and PC before, though.
I have Fallout 3 on the Xbox, which I love, and I have it on the PC, mainly for modding and getting more out of it, away from the quests and storyline.
I voted 360 because I love my PC, but currently it's lacking in power and becoming outdated so I'm not enjoying PC gaming as much.
This is partially why I prefer my Console to my PC, too.
Games for Consoles are made so that the Console can always run them at it's best possible quality.
Also, my Xbox is always going to be top of the line for an Xbox.
I'm not going to find myself struggling with slow games because my Console has a bad graphics card, or not enough RAM.
I do need a new Graphics Card though for my computer (The rest runs beautifully) and I should be able to play some of my computer games to a better extent. Fallout 3 and TF2, primarily. As well as Spore (If I ever find my disc).