It was suggested to me when I first got Julia that I leave the carrier out and let her get acquainted with it in the house. It turned out she enjoyed playing "house" in it, so whenever I had to take it somewhere, she didn't argue and fight when I went to put her in it.
Later, I got one of those new rollabord carriers, and she liked that even more than the old one. I never left them out all the time, just long enough for her to not be intimidated by it.
OTOH, she was really manhandled by the first vet who ever saw her, and ended up hating the vet for life. Even tho the next and always vet was very kind and loving, they never could even weigh her without first sedating her! (And that first vet was recommended by "Friends of Animals!" -- some friend!