In order:

PS3
PSP
DS
360

... I don't own a Wii yet, but that's going to change soon.
... I've given up PC gaming since 2001

notice the "Your" in "Your"

if "Your" most played console is "Your" 360 , then "Your" main gaming machine will be "Your" 360

pc

ps2

haven't considered any of the current gen consoles worth buying so far...with all the great games coming and now on the ps3 will probably get one soon though

My Nintendo Wii is my main console as it has most of the games I want. It's going to be even more apparent next year. List of consoles in order:

Wii
360
DS

For consoles: Wii for me for me although i played Halo 3 A LOT ! but in general the wii wins in my house
For Portables: iPhone/iPod by far

woah ps3 overkill

Wii definately, it has Nintendo games which are ma favourite plus i like the idea of motion control.

Then the 360 , since that's the console i have in University, main reason i own it is because it has a good selection of RPG's both Japanese and Western

And the DS wehenever im on the go

That depends on when you start counting. I started playing Guild Wars back in 2005, and I have clocked 2500+ hours in that game alone, plus a lot of other PC games. But since I got my PS3, it has by far been my main gaming machine.

I voted PS3 because I think it reflects my current generation gaming habbits the most.

PS3333333333333333333333333333333333

DS, simply because of the amount of RPGs I have for it. Even though I have more Wii games than 360 games, I have more RPGs for the 360. My Wii and 360 gaming time might be about the same amount.