Lol. Normally in my experience, if a girl has a nasty looking walk, then more likely she smells like she walks. Now I like a plump butt but not oversized and sloppy because if its too big, 9 times out of ten, she has a hard time keeping it clean.
Take a look at this.... http://2.bp.blogspot.com/-Ofzs10FwtKM/TgZtlC7-RnI/AAAAAAAAAJ0/R755XaYXLM8/s1600/Butt.jpg
Could you imagine diving into that? Could you imagine the smell? smdh...You know its not clean. No ****ing way.
But to answer your question. Most of the time I like a girl who has that natural scent of her juices and then she smell like whatever lotion or perfume she use and if they leaving the club, even better. But I had girls go to the bathroom before we do it if we been out all day and I hear the water running so their clean, you know they care. The more you have sex with her throughout the day, night, her real scent should come out. The outside surface tells you nothing but if you dig deep or play really in her, you will get her scent. I only had a few girls who really smelled bad and I didnt hit them. That strong fishy or rough smell is a turn off and theres no way Im diving into that.