I'd have been scared!!! :-D :-D
I think we all do make first impression judgements, we can't help it, but it only lasts for that first few seconds, then it is gone........ I enjoy getting to know people. :-)
I'm utterly and totally rubbish at picturing people via phone and e-mail conversations they are never, ever as I predict as I'm sure neither am I. The strangest one I've had is someone said "You don't look like you own dogs?" What do people who own dogs look like?

Gosh, that one really threw me, didn't know what to say to that. :-D (Maybe they think we all wear wellies and trench coats all day long. :-D)
The one and only thing that really puts me off and funny that you mentioned it, is a breeder or puppy owner having a dirty, messy home, can't stand it, no excuse for it and I can't wait to get out!!! It would rightly or wrongly definitely make me write someone off. So even if you'd had a two minute shocked face from me at seeing lots of tattoos I'd have happily exhaled at seeing a nice clean home. :-D And only focussed on the pups from there-on-in.