I stood for a few years .....hated every minute it.....went back to sitting and never looked back !!.....seems to me unnatural to play a KB standing up especially actuating pedals if you use them also, you dont see people playing a piano standing up?.......not to mention my feet still hurt talking about it

Four hour gigs tend to take a toll on your legs after a while day after day....and double gigs 8 hrs Fugettabouttit will swell the ankles big time lol.. some might think they look cool, but personally I'll pull up a seat every time.
What say you?..