I'm hoping that the 360 exclusives don't impress you much either, then. I personally think the PS3 has better exclusives now than the 360, but to each his own.
If you have a decent PC PS3 exclusives > Xbox
if you don't than I could see the argument that Xbox ones are better but I respectfully disagree and still consider the PS3 exclusives superior
for 360 I have
Halo 3
Halo ODST
GoW 1 & 2 (GoW 1 is available on PC)
Forza
Project Gotham Racing
Fable 1 (available on PC)
Fable 2
360/PC (I own these on PC)
Mass Effect 1 & 2
L4D 1 & 2
Upcoming:
Fable 3
Halo Reach
for PS 3
Uncharted 1 & 2
Resistance 1 & 2
Killzone 2
Ratchet and Clank (All 3)
Valkyria Chronicles
Devil May Cry 4
Metal Gear Solid
Little Bigplanet (ordered but have not recieved it yet)
Have not purchased yet but will when it drops in price:
Demon's Souls
Yakuza 3
Upcoming:
Heavy Rain
God of War 3
GT5 (maybe)
Yakuza 4 (maybe)
everything else I have is multiplatform
I didn't get Mass Effect for the Xbox since I had it for PC prior to buying my 360 and got Mass Effect 2 for PC since they came out at the same time