Nobody. No developer consistently makes quality games I'm interested in. It's mainly they make one game I care for and another game I couldn't give two shits about. The closest is probably Bioware, but with their previous two releases being somewhat disappointing (Dragon Age 2 and Mass Effect 3), they're no longer consistent with me. I guess Atlus is the one developer I can count on nowadays, though, so I guess I choose them.
Agree with this. There isn't really one developer for me that really stands out as being completely consistent. Mass Effect 3 was okay at best and I wasn't a fan of DA2 so Bioware is out. I'd say the closest for me is Rockstar as I do love their games. I do get annoyed at how they sometimes seem to sacrifice gameplay for "story" or cinematics most recently. Nintendo I guess is overall pretty consistent too though most of their games aren't a 'must-buy' for me.