What's your favorite version of Mac OS X?

[Cognizant]

What version of Mac OS X are you most comfortable with, or just prefer?

For me, it's a tie btwn. 10.4 and 10.6

[Rayquaza]

10.6 for me. Very strange how iCloud only just came in 10.8

[Infidelitas]

I prefer the versions from the 90's. I hate todays versions