i never had a fixed retainer but i had a removable one...that was a pain! i kept losing it and i felt bad because they are $150 a piece! (i had top AND bottom and lost them both three times)

i hated them because for every little thing i wanted to eat (say a little cookie) i had to take the retainer out or else it gets REALLY messy...i don't think fixed retainers would get messy...]
think of a fixed retainer like braces...they are permanent, and you kinda got over it when they didn't "sit right" and poked you and gave you blisters, right?
i had the old retainers..the pink ones that go all the way to the roof of your mouth...sry i don't know much about the new clear ones that just go over your teeth.