This is just a minor thing, and maybe it's just me... But sometimes when shut-down for whatever reason and trying to start back up, I hit P... Then, thinking it may be lagging (or just being impatient) hit P again - start up, then immediately shut down. Dammit.
A small but useful idea I think would be some sort of immediate response to the initial press - even just a bleep of confirmation that the command was recieved.
Thoughts?