For me, larger butts have been an acquired taste. My wife's butt is bigger than average and she's always wished it was small. But it is quite sexy and we both have learned to appreciate its, umm assets...
Couple years ago she and a friend attended a social event that was mostly attended by black folks. She said the guys were politely but definitively complimenting her "ghetto onion".
She loves to have me rub my cock all over it and shoot my load on her cheeks and crack. We toy with anal sex, but haven't attempted it as the largest object we can insert painlessly is a 1.25" butt plug. Doggie is super hot...her asscheeks fit in my hips perfectly when I go balls-deep, the accentuated arch of her back.....mmmmm.....