Btw CTRL-Q is auto quantization. I usually just record a line in there and auto-quantize.
It's not essential, but it's well worth having.
I find I come up with much better melodys using a midi keyboard.
Sometimes if I stuck for an idea for a track, just hit record and muck around for a while on the keyboard... if I manage to do a nice rift then I take it from there.
i feel i can be more creative with a midi keyboard.
also if you have one you should learn how to play it properly aswell, so when you use pads you dont just use one key at a time...you use multiple chords which can sound amazing