Sure, some are thin and flexible; others may be on the thicker side but still great for cuddling. I prefer that my head be nestled firmly, so I tend to stay away from those that'd been 'worn in.'
I might sleep with quite a few but there's only one I couldn't live without.
No matter what, It's important you find the one that you are the most comfortable with.

A great pillow is hard to come by.