Since I grew-up playing organ, I find the action of a piano slow and painful.
That's just because your fingers are weak.
My hand position is all wrong for piano. Organ is flat hand.
Gross. I even curl my fingers on organ. It just feels better. A dude I met last year during a concert we had commented on my fingers being curled. He thought it was neat, even though he plays better than me.
I use the same finger to play multiple notes. I keep my hands (fingers) wide.
Can we say CTS (carpal tunnel syndrome) waiting to happen? I play multiple notes only with my thumb....sometimes.
I wipe notes using my finger-tips and palms. I drop my wrists.
Wiping is cool, but you "DROP YOUR WRISTS???" Yep. CTS. *praying* In the name of JESUS, protect his hands right now!
I use strange fingerings for speed and also for "legato" playing.
Well I guess you can get used to anything.

Actually, I know a lot of people that do this, I used to but my hands started to hurt. I guess I wasn't used to it yet, but all jokes aside, you should read this:
http://www.ninds.nih.gov/health_and_medical/pubs/carpal_tunnel.htm