Here's what I love about cats. They can be comfortable almost anywhere.
In this picture, Annie is on my shoulder. My shoulder and arm were vaguely horizontal at that moment, and she took the opportunity to sit down like it was the floor. It's quite gratifying to be treated as a floor by a small creature; it's hard to explain why, but if you've experienced it, you know what I mean.
She looks like she might be playing here, but at that moment she was taking a break. The break lasted somewhere between 500 and 1500 milliseconds, but that's a decent break for a kitten.