Attractiveness wouldn't be among my prime criteria for "favorite actress" though.
Discussion
It would definitely be up there for me. Because if a girl's really pretty you can kinda forgive bad acting. But she's gotta be at least up there.
But shouldn't the acting thing be the most important factor in this particular question? I love Judy Dench for example but I don't feel any attraction to her at any age.
I can see where you're coming from since not everyone you love seeing is someone you're really attracted to. A killer performance is still killer regardless of how the actor looks.
But some of the appeal of watching movies is the eye candy. For men and for women. Unless you're watching something really grim and gritty. Even then, It'd still be nice to spend two and half hours watching attractive people.