I do, actually, have a few favorite female actors, such as Jeri Ryan, Felicia Day, Zoe Saldana, and Heather Graham, but as for whom I would rank at the top of my faves it's a dead heat between Dame Judi Dench, and Dame Helen Mirren. Both bring an amazing gravitas and dignity to whatever roles they portray, yet both have a spritely sense of humor that keeps them fun to watch as well. If forced to choose one, I'd go with Mirren simply because she's been in more of my favorite movies, i.e. 2010 and Excalibur, and after seeing her in RED last year it's clear that her sex appeal has not diminished one iota with age. So I choose her performance in 2010 as my film with my favorite actor (female).