Well, being a bit of a thesp myself, I tend to like character actresses like Kathy Bates and Kathy Burke.
Also the great English actresses - Emma Thompson, Juliet Stephenson etc.
As for Hollywood I like Glenn Close and Meryl Streep.
And of the greats that have passed on - Katharine Hepburn and Bette Davies. Oh, and Agnes Moorhead, Peggy Ashcroft , Jessica Tandy - basically anyone who has the ability to actually assume another character and not just stand there looking thin and pretty.
Also, I used to like Cher when she still had the ability to do facial expressions