in fact i use pause as the debug key in my games, specifically because it's unlikely to conflict with any regular binding anyone is likely to make
i rebound caps lock to be my compose key
and i think i would probably die without home/end/pgup/pgdn??
could not tell you what scroll lock does though. and num lock is weird as hell like why would i want to turn the numpad into a duplicate set of the keys right next to the numpad