Im BF-fan, but looking at the gameplay trailers so far, I think TitanFall might be the best out of the 3. Just a first impression. Ultimately, during game launch, it boils down to these:
1) Are there any major bugs in the game? And what is the developers' approach to bug-fixing?
2) Do the developers listen to the gamers, in regards to improvements to the game?
3) The amount of hackers in the game