Gaming

I don't agree at all, I think it has to do everything with it being 3d.

For any game, I don't want to look at the thing I'm controlling often - I need to feel where I am, and not see where I am. Many 3rd person games break that for me - the camera-object distance is not fixed for various reasons (speed indication, avoiding a wall, motion smoothing), and that immediately breaks the feeling of control for me. Not to mention anything that takes control of the camera.

With 1st person controls you always get perfect motion controls, a camera that cannot accidentally clip into walls, and motion smoothing does not exist. If a game is 1st person,you don't need it to be desiged as a platforming game for its controls to be good for platforming - take a look at Minecraft or Counter Strike with their emergent gamemodes.

I might be biased from the hundreds of hours of cs surf though.

Having a quick look at how A Hat in a Time looks, I think I wouldn't enjoy its platforming as well, as it seems to suffer from the same problems.