None. I don't like any of those series.
I've played Gears 2, but the story was appalling and all the Gears were walking fridges with the character development of a mentally retarded ashtray. I couldn't bring myself to play the story past the massive war truck escort thing. Still, it was a gift from a friend, so I reluctantly went on the multiplayer with him. And I can easily say it was the worst multiplayer game I have ever played, and thats including Enemy Territory: Quake Wars.
Ofcourse, I wasn't very good at it, and if I was I might have enjoyed it more. But the inconsistency and generally luck involved was just retarded. "Three feet away with a shotgun. I fire, hit the guy, nothing. He fires about an inch closer, hits me, and I explode." And yes, I know about the active reload and all that. That doesn't mention the soggy controls, either.
So yeah, couldn't care less about Gears 3, while Resistance and Uncharted are PS3 exclusives (I think), so they're out of the running.
Off-topic: My captcha is Gonzalez alforec. love it.