most to least
PC
360
Wii
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PS3
I own mgs4, lbp, motorstorm 1, pain, mk2, siren, warhawk, flower, I bought killzone 2 but just hated the aiming controls (probably doesn't help I expect pc fps like precesion since i have alot of fps on pc) so I sold if off for a 5 dollar profit.
honestly no game on the system that ive rented or own has made it "worth it", Galaxy is that for my wii, Dead Rising is that for my 360, and...*insert a gajillion old and new pc games here* are that for my pc.
I did buy the ps3 (the metal gear bundle) with my 600 dollah bush stimulus check, so at least I feel like i didnt spend my money on one.
if i had to choose id only have a Wii, (along with a good pc of course :lol ) having a good pc overlaps so much of the 360/ps3 that sometimes they really dont seem worth it (cept dead rising).