I think Super Mario 3D Land is more of a 3D Mario game and better than Mario 64, but my opinion on it is it could have been better. It's not as good as the NES and SNES games. Maybe no Mario game will be, but it was just too easy.
The reason I don't like 64 for those that are interested after seeing the above. I didn't like the whole return to the same stage multiple times to get a star then be warped all the way out. All the stages are small and warping you out every time you get one is a cheap was of artificially extending the game time. I understand certain ones like race to the top or beat King Bobomb that they can't allow you to get those ones without going back, but the ones that don't have any special circumstance they could.
Haven't played Sunshine or either Galaxy so no opinion on those.