I've always been partial to the big guys in heavy armor. Mechs and powered armor has always been on my list of “Things I wish I could Draw.” I've always liked designs that are much larger than the pilot, and the pilot moves around like he normally would inside. Levers and knobs are all fine and good for cars and tanks, but I think the best mechs are the ones that mimic the movements of the pilot inside.
You want impractical? I'll
show you impractical! ;D

-W