I will probably watch the grand finals. I used to watch all of the SC2 tournaments but I became more interested in Dota 2 and have not been watching as much Starcraft as I once did, Especially since they put the season 2 region finals on the same weekend as TI3. I guess I would be rooting for either Jaedong, Polt, Grubby or Scarlett but I think that besides the favorites that you mentioned, Bomber probably has a pretty decent chance because he always has been a strong player.
I am mainly just hoping for a well produced finals, minimal downtime and good production value because after watching TI3 I could see how poor some of these SC2 tournaments actually were.