I'm liking my new Lion install. Mac OS X 10.7.2 seems to run faster than ever, especially in terms of graphics. And I like Apple's choice to generally tone-down the colors and flashiness in the user interface. Apple heads in the opposite direction of Microsoft as Redmond continues to turn up the visual volume-knob on the in-your-face interface of Windows.
Unfortunately, Apple made one poor choice. Lion now has a subtle but annoying animation on every single window as it opens. A zooming rectangle grows from a central point outwards before the actual window appears. It serves no useful purpose. May sound like no big deal, but after working a long while and staring at the screen, all those window-zooms made me dizzy.
While System Preferences is ignorant of this feature, nevertheless you can disable this animation. Just copy-paste this single line in Terminal.app:
defaults write NSGlobalDomain NSAutomaticWindowAnimationsEnabled -bool NO
I found this useful tip in the amazingly thorough review of Lion by John Siracusa. I highly recommend that article when you upgrade to Lion.
Another animation to kill: the shrinking/zooming effect when triggering Mission Control. To disable:
defaults write com.apple.dock expose-animation-duration -int 0; killall Dock
defaults delete com.apple.dock expose-animation-duration; killall Dock
If only we could kill the nauseating sliding of entire screen when using the shortcut (two-finger swipe on Magic Mouse) to switch between Spaces or full-screen apps.