INS, Home, End, Del key need to be in the correct spot. I don't use Page up and Page Down much. Never use the multimedia keyboard "features." They just cause problems for me. The F1-F12 keys need to be properly spaced. And the arrow keys need to be the correct distance away from the alphabet keys. The control, alt, and windows keys need to be in the correct spots on both sides of the keyboard. And an absolute must is the backspace must be normal size. Enormous enter buttons with a tiny backspace at the top right are ridiculous.