[rgawdzik]

The other recommendations are awesome.

For me, I like using a lot of desktop window management, however the Mission Control transitions are too slow for me, with the fact that are bulky and uncustomizable.

There is TotalSpaces2, which basically is similar to Ubuntu/etc spaces, but you can customize the transitions, hotkeys, locations, etc. Even though I don't have any transitions (so my switching is instant), you can have cube transitions, etc, very similar to Gnome. Downside to the program: $18, with a trial. If you miss proper desktop management, do it. Combined with Spectacle (A tiling window manager), I have functionality similar to XMonad, so I can use my mac effectively.