Here are some reasons to love Snow Leopard.
1: A completely rewritten OS
Mac OS X 10.6 has been rewritten to 90%.
2: OpenCL in the system
OpenCL is a technology that seems most effective with compatible cards.
3: QuickTime X
QuickTime X can use the acceleration of certain graphics cards.
Mac OS X is perfectly supports playback of media and burning files on Blu-ray.
Snow Leopard offers something that Microsoft could never do: launch applications 64-bit and 32-bit applications on the same system.
6: A lot of new
The Snow Leopard system is updated at multiple locations with multiple small improvements are really ergonomic.
7: 64-bit accelerates
8: An enhanced Finder
9: A very good compatibility