I absolutely agree that imperfections are what gives a composition character and brings it down back down to earth – especially when working with MIDI where it’s too easy to just hit the quantize button and be on your way.

I wrote about exactly that in this post: http://www.servethesong.net/midi-songwriting-enhance-dont-hinder-creative-flow/

just another tip: quantize your midi to audio (e.g.: a drumloop played by a human drummer).

bye!