What about individual traits?
I find Carrie Brownstein, Kristen Schaal, and Brooke Dillman attractive. Also I should maybe put Mageina Tovah in there, but when she's not in movies she looks a little more conventional I guess.
Most of the celebrities I find attractive would be considered conventionally attractive.
I did have a crush on David Letterman though, when I was a teenager. I think it was his style of humour I was attracted too, not so much his looks.
Also there’s Jack Nicholson and again with Christopher Walken:). I’m attracted to their eyes. They have crazy eyes. Christian Slater has crazy eyes too, but I don’t think he counts cos would be considered conventionally attractive. Well, In the 90’s anyway. He doesn’t look that great now. I’ve had too much coffee.