Infamous, Uncharted and Resistance for me.

The quality of the 3 platformers might be higher, but there's very little variety (they are after all 3 platformers)

That's a hard choice... I'll start with my personal rankings:

Jak > Uncharted > inFamous > Sly Cooper > Resistance > Ratchet

Though I don't care much for PS2 Ratchet (the PS3 ones are epic), Jak was freaking awesome! I'll have to give the slight edge to the platformers because of Jak. This might of course change with Uncharted 2 coming out, and I can't be sure about inFamous either, since I've not played it.

Give all of them and I'll be happy. :D

The second one, just because Ratchet is infinitely superior to anything else.

no idea about Infamous but I'd take a nice platformer vs open world action/lightning shooter thingy... so Sly I guess, other then that Uncharted > Jak, Ratchet > Resistance, though they just need Spyro back and Spyro > all.