I have a few:
Morgan Freeman would be number one, has been since I saw Deep Impact where he played the President... his voice is perfect! It made me think, if I was in that situation, in the end, his voice would be calming. The next movie I saw him in was High Crimes and I loved his character there too... finally, I saw March of the Penguins and Morgan Freeman was forever solidified as my favorite.
Mary-Louise Parker. She's so weird but it really works for the characters she plays.
Alan Rickman. Gotta love the metatron 
BAHAHAHAAHAHHAHA!!!!! The voice of the One True God!
BAHAHAHAHAHAHHAHAH!!!!!!!!!




FUNNIEST MOVIE EVER!!!!
Ahhh, so now that I've picked myself up off the floor:
MEN:
Matt Damon (I don't want to love him, but I can't help it)
Ryan Reynolds (HYSTERICAL!)
Robert Downey Jr (Chaplin, nuff said)
Sean Connery (THAT VOICE!!)
Johnny Depp (Love the dark side of him)
WOMEN:
Susan Sarandon (she could've stopped at Bull Durham and still been on my list
Reece Witherspoon (See Matt Damon remark)
Sandra Bullock (she freaks out incredibly well)
Cloris Leachman (way too funny!)
Meryl Streep (Postcards from the Edge,

)
At any rate, I need to throw out honorable mentions to :
Tim Robbins and Sally Field.
MERRY CHRISTMAS YA'LL!!