Not that I have a specific type (although, not American is what I usually go for), but my last three girlfriends were very gorgeous women. A Palestinian Model and Actress, a Romanian/Panamanian actress, and a lovely lovely blonde hair blue eyed Russian girl that could've modeled but choose instead to be a fashion/web/graphic designer.
So yeah Tati, I know what hot is and I'll totally agree that Thora is not really hot. But she's not anywhere near fuck ugly either.
Not everyone goes for what we think of as ideally beautiful though, I don't always.
Even dated a fat Jewish girl for a long while. Because she had a great personality, was funny as hell, and despite sort of looking like an older version of the little girl from Problem Child 2, she had a really cute face and fantastic jugs. And more importantly she worked for Sundance. All in all I'd say that was one of my better relationships.
So in short, I'd fuck the shit out of Thora Birch. She's like a spin top, can never go wrong with one of those.