Uncharted 2. MGS4 was good, a great game, but it wasn't fun to PLAY. It was cinematic, it was necessary and it was a great end to the Metal Gear Solid series, but even with the "improved" controls, it was still clunky and I'll be honest and state that I enjoyed the cut-scenes more than the parts you played.
But Uncharted 2 - cinematic AND a joy to play. Yes the story isn't deep, but it's well written with a cast of likeable characters. It was my favourite game of 09 by far.
However, Uncharted 1 wasn't so great. It wasn't bad, but it shouldn't be on this list.