In your opinion, which makes the better model for a video or photo shoot? To better explain, I've seen a handful of different types of girls in video. Girls who definitely seem to be models, the amateur, the girl next door type, even girls who I only found out later are porn stars. So, which makes for your favorite?

I don't necessarily have a "favorite", more of a "preference". A great example to me of this is Jana Jordan. I would never have thought she was a porn star. To me, she comes across in "Stocking Stuffer" on wamclub.com as just the girl next door type who happens to enjoy the mess and isn't afraid to show some skin. I also enjoy the scenes in which the girl genuinely enjoys the experience. It doesn't need out and out sexual arousal for her, just that she's having a good time.

As you said, it is really a matter of opinion. I tend to like girl-next-door types (if you live next to a really hot girl). I don't like tattoos or the overly made-up look. I like a little curve. That said, I have gotten WAM "crushes" on all types of models. A lot of it is attitude. Does this seem like a woman I would date?
Three of my favorite (off top of my head): Anglefan's Art Student; Messygirl's Katie (sad she didn't become a long-time regular); and of course Toshia from Slapstick Stuff.

The smile.

If they have a natural smile or laugh and look like they are enjoying themselves and having fun. Anything else is secondary. A fake smile on the most aesthetically perfect model just won't do it for me.

That's what I was trying to say, thanks. I agree completely that a natural, easy smile makes the girl so much more attractive to me.