For me, comfort is mostly about monitor height.
in reply to A job, a chair, and Perl
If it's too low, I end up hunched over and looking like Quasimodo all day. A couple of weeks like that, and I catch myself hunching when I'm away from the computer. Gah!
My home computer is set up perfectly for me...my work computer is almost right, but there's only so many phone books one can put under a monitor before it becomes a hazard.
Seating is impossible to really get right, at least for me. If I drop the chair down low enough so that the monitor is in a good spot, then my arms start hurting partway through the day because our desks don't have keyboard trays. If I raise the chair so that my arms don't hurt, the monitor is too low and my legs start to fall asleep because my feet can't easily touch the ground.
I just can't win with this chair. Grrrr...