Uncharted 2, by far. Best gameplay, story, level design and pacing of the three games - not played Golden Abyss. 3 was a big step down for me. Especially after the excellent first sequel.. UC1 too, is a very good game but is the weakest in terms of playability (gameplay).
For me it goes 2 > 3 > 1.
And lol at the poll. Is that you Aldro?