Metroid: Other M is a mixed back for me, on one hand i liked what Retro had done with it, on the other hand I really liked Super Metroid. Its kinda funny if you think about the uproar of Metroid getting turned into a first person game, and how theres a reverse uproar for it being unturned into an fps game. Other M looks like a 2.5d Super Metroid game running on a pretty decent engine.
similar things have happened to Donkey Kong Country, while i wanted retro to do something different, i actually think they are taking the Donkey Kong series in the right direction. As much as i like DK64, i didn't think the game captured the feel of the old game in 3d. A lot of the things that looked really cool in 2d didn't translate to 3d. Still 2.5d could be even better. Prince of Persia for instance is a 3d game, but a lot of times there would be fixed angles and this would make it play a little more like a 2d platformer. When fighting came then the camera would be pretty free. This makes a good mix(pretty much what metroid is doing) The best part of donkey kong 64 was the fighting and stuff, but swinging was really really lame looking in 3d whereas its really really cool looking in 2d.