What do you sit on while playing?

I tried taking the arms off my computer chair like a few others, and I must say it's great. :)

I sit on an old ugly yellow teachers chair. I am confused. Was it the teacher who was old, ugly and yellow or the chair? The reason I ask is because I have run across both in my time

I have just switched to the classical position so now I sit on a $15 target stool and use a home made footstool. Thinking about trying one of the guitar cushions instead of the footstool