Personally from face value I could'nt fall in love with a pornstar because of what they do. That said, as hard as it would be at first, (no pun intented) I think it would become possible to fall in love with one, if you got to know them. Also, i've always thought if you're walking down the street with one, they would obviously be recognised and you would get people shouting out anything and everything at them. Which would be tough to take.
Anyway to answer the question i'd say I think Riley Brook is super hot but she's done some pretty unclassy porno's.