The most popular ones make perfect sense, and not just for Ubuntu but for all linuses: http://brainstorm.ubuntu.com/most_popular_ever/ http://brainstorm.ubuntu.

The most popular ones make perfect sense, and not just for Ubuntu but for all linuses: http://brainstorm.ubuntu.com/most_popular_ever/ http://brainstorm.ubuntu.com/most_popular_ever/ Power Management, Suspend/Resume, Network management via UI and booting time are all huge issues on all distros I've used.