I get all my games for ps3 over 360 with few exceptions that I will eventually list, why because for so long overyone screamed Sony was doomed and I did not wan't to see it that way. Secondly because I have not respected a lot of Microsofts business practices. Especially the one that only help 360 only owners (if even that) when they basically give the bird to multiplatform owners by claiming games are exclusive only to have it revealed about 8 months later that this is not the case.
The times I have bought a 360 multiplat has been during the two times my ps3 has broke which I'm curretly still in the second time. And when the game was basically for online multiplayer only and I knew I had friends from the outside world to play with. That means the COD series since 4 and Borderlands.
I still like both platforms, but I admidt I respect Sony more than Microsoft from a gamers perspective.