Perfect Dark Zero was amazing. The actual gunfights are more satisfying than the gunfights in any other shooter, save maybe Metro 2033.
As far as the campaign goes: Halo: CE > Halo 4 > Halo 3 > Halo 2 > Halo 5 <--- I'm sure there are at least two unpopular rankings in there somewhere.
N64 Rainbow Road had perfect length.
Metroid Prime lacks replay value.
Super Smash Bros. 64 has the best gameplay in the series.