This is a hard question to answer. I'll start by saying that Nintendo is definitely the least responsive. They simply don't give a shit what anyone says. They do what they think is best. Sometimes they're right, sometimes they're wrong. But, they're never gonna change for you, me, or anyone else.
It would seem that Sony has delivered what gamers want the most recently. But, I feel like MS has done the most changing in response to fan feedback. That may be because they didn't listen upfront though. I voted for Sony, assuming that they didn't just get lucky with all of their hits lately. I'm figuring they have produced these great, appealing games because they've correctly read the market, and given the market what it wants.