Oblivion actually is the example that made me realize how much I dislike the perspective, all the screenshots looked very pretty so I was curious to see it in motion, and the first thing that turned me off was the battles, I couldnt find them appealing at all, even when I tried to imagine playing them with the remote, so you can imagine what I think of the perspective to be played with a mouse or the 360 controller.
Regarding the change from third to first person, its a good option, but I personally prefer the game changing perspectives accordingly like 3D Zeldas rather than me having to decide, it makes the experience more seamless