I'm still on Snow Leopard for 1 simple reason: Spaces. I usually have many windows open at once and like how in Snow Leopard, the spaces are already set up for me, tiled vertically/horizontally to my configuration. I tried Lion for a couple months and could never get used to the new way Spaces was handled through Mission Control. I didn't like how I had to click the + button to open a new Space and how they were tiled horizontally with just one row. So is anyone else in my situation, and is there any way to re-enable old Spaces animations and tiling in Lion or Mountain Lion?