Hollister hands down.
I've tried them all and have numerous articles of clothing from all three. I'd have more if Hollister had a store near me but the nearest one is near 3 hours away.
Hollister because the clothing feels so good on my skin. Almost every dress or top I own is Hollister. I don't like their small clothes, those things break or tangle so easily, just stick with clothing.
A&F is okay, the clothing is super soft as well but the price is just jaw-dropping.
Aero is cute but lately they keep selling these other clothing collections and I just can't get into them. Aero small clothes; like panties, are really cute and I usually pick a few up when I go. They last and their sizes are correct.