I think that would be useful.
However, I try to avoid mouse clicks whenever I can. I'd rather be able to assign commonly used keywords to the keyboard. The problem is that most easy keyboard combinations are already used and only leaves combinations like Alt+Shift+1. Admittedly, the finger gymnastics required to type such a combinations limits its usefulness. However, the real attraction to me is that the keyboard access makes it easy to program into a game keypad like the Belkin Nostromo SpeedPad. This keypad is an incredible efficiency booster which I find indispensable when processing large number of images.
Deven