One feature that I have been missing for a long time is a simple shortcut key for pause and play. For example F5 or Space.
Now Spece/Enter do the trick IF you have the Play/Pause button activated, but if you have for example just adjusted the volume, Space/Enter do nothing.
Also good UI design requires that all the functions that you have on the UI should be accessible without clicking with mouse.
Best answer by ratty
Ctrl+P
All the shortcuts are listed in Help/Keyboard Shortcuts.