I've noticed Julie DOES NOT like any kind of confined space...like her carrier, or the cubby hole in her cat gym, she doesn't get in boxes or bags like most kitties to play. I've wondered if she just remembers spending too much time in carriers or cages before she was adopted. She was very young when she was rescued as a stray. I don't know what the conditions were where she was found.
BUT...then again...she has torn the undercover of my box springs and gets up inside there to sleep...so go figure!