I use a CRT display screen. I was much put-out to discover that Ubuntu 11.10 has confiscated the display configuration option used to set the screen refresh rate. Using a CRT display screen at 60Hz refresh frequency is a dismal experience. Can I get this through to the Ubuntu people? No way! It is quite impossible to communicate the problem to them.
Ubuntu 11.04 allows control of screen refresh rate. I hope that version 12.04 reinstates it.
The Unity UI is another thing that might send me into the arms of Fedora.