I'm interested in seeing what everyone's favourite version of OS X is. With the stark contrast of the clean, Aqua UI in Cheetah-Tiger, to the very 'iOS-ish' feel found in Lion & Mountain Lion. Please drop a vote! My personal favourite is Snow Leopard. It's so incredibly streamlined, slick & quick. It really is just a slimmed down, un-bloated version of Leopard... And that's a good thing. I'm really not a fan of Lion+ as I feel OS X is becoming more & more like a bloated version of iOS. I also absolutely adore Tiger for, again, in the similar way to Snow Leopard, it's super slick, refined nature.