Sucker Punch explains why they develop exclusively on the PS3
Obviously, going cross platform enables a game to sell to a larger user base. Why has Sucker Punch, an independent studio, chosen to stick with PlayStation exclusive development? Joystiq explains:
While the exec notes without reservation that the studio is in this business to make money, he adds that you “have to be careful about being greedy.” He adds that the pursuit of dollars has to be weighed against other things, like enjoying what you do for a living, publisher relations and game quality.
So partly because of the simplicity of focusing on one hardware platform, and partly because of improved publisher relations, but also, a big part of their choice is plain personal preference. They enjoy working with the PS3 and they are probably PlayStation fans on their own time as gamers, not just as developers.
Notice that they did NOT spew venom and bash the 360 or the PC, or fabricate technical reasons to rationalize their preference (we are too small a developer, the other technology is difficult to use, we have a hatred of their architecture, etc).
BTW, there are plenty of very respectful 360-exclusive developers as well. Remedy is a high-quality developer that’s been very respectful on these topics. Epic, the studio behind the 360 mega-exclusive Gears of War, has extensively and graciously complimented the PS3 and competing titles like Resistance.