Depends if you want one time sex, or someone you can stand to be around. I find Tina Fey far more attractive than Jolie for example.. Sure, Jolie is hot, prostitute hot, porno movie hot, but that's it. I have no interest in her other than that.
Most hollywood bimbos turn me off the minute they open their mouths. Frankly, I found Jolie hotter in "Hackers" before her megastardom, back before I became aware of her more disturbing personality quirks and the whole Billy Bob Thorton 'we carry each others blood' stuff.
The thing is, there's gazillions of hot women who will turn you on by looks alone. I'm sure your porn collection has a vast and diverse variety of them. But only a tiny minority of them are "interesting"
The current hoopla over Megan Fox leaves me puzzled. She seems, and even portrays, trailer trash. I don't find her all that hot, and I thought the other chicks in transformers (1 and 2) were more appealing. When Catherine Bach portrayed Daisy Duke, she didn't seem like hick trash, she seemed high class. But Jessica Simpson and Megan Fox really do seem like trash.