I've messed with a few. Not huge just chubby/thick. The vagina still feels the same son.
But I would not date a big girl ever. Just my preference. I would get tired real quick. Sometimes sex can just be that right moment of attraction. Or that right mix of alcohol...
If they have a pretty face and nice tits I'll forget about the mushed up gross legs and rolls for a small period of time. I can't see having to deal with that on the reg though.