I've got 4 or 5 domains with GoDaddy, non adult, low traffic. Always found them OK on the phone, but I lost a domain I didn't really care about a year or so ago because I forgot to renew it. My fault entirely, but for the domains that count I still use Netsol because they remind me about 17 times to renew the damn things.
I don't mind paying a little extra for that
I'd never use a mainstream outfit to host adult sites though, wether they allow it or not. They don't speak the same language.