I would like an elegant companion from a more civilized age who isn't all that touchy-feely.
Then again, I could also spring for a more bubbly girl, so who knows. My taste in women is pretty varied from day to day.
I guess, though, I'd like someone who I didn't need to talk to in order to communicate with, and here's what I mean by that: I'd love nothing more than to be with a girl at about 2 AM, the two of us just sitting around. Not having sex, not really doing anything. Just enjoying each other's presence. We wouldn't talk because we wouldn't have to. Just sounds freaking awesome to me. And really, that could happen no matter what kind of personality my hypothetical significant other would have.
Now, I'd also like her not to be too physically clingy. First of all, it would take me forever to even begin to be comfortable with that, and second, on the rare occasions that we held each other, it would be extraordinarily valuable. I've always hated PDA, so none of that, hopefully because we wouldn't have to.
I don't want her to be cold, though, just not OVERLY expressive. Aside from the extreme extrovert, I feel like there's a lot of leeway there in terms of personality.
Being Christian is kind of a dealbreaker, if for no other reason than I'd just like to not argue all the time. Someone who shares my values, ya know? I also like a girl who keeps secrets.
Physically. Hm. Height? I'd like someone on the taller side, but really any height will be fine. Weight? Just not morbidly obese. Sounds shallow, but that would probably be a dealbreaker as well. As for hair, just like every other male on the planet, I like red hair. But a rich brown, almost a deep red, is amazing. I'd also prefer a longer haircut. Ethnicity is no object. In fact, I think it would be cool to date someone of another race who has an atypical eye color, though I'm sure the chances of that are slim to none.
Let me also say that I freakin love girl's eyes. Not in a gross, keep em in a jar sort of way, but in an admiring way. I love expressive, large features, and eyes can be gorgeous. I prefer colored eyes (green, preferably) but I've seen plenty of brown eyed girls that are gorgeous. I love big eyes. Oddly colored eyes. Shiny eyes. Anne Hathaway's features are a good example.