I would to preface this by saying I have not had a chance to see A Serious Man, The White Ribbon, Fantastic Mr. Fox, or A Single Man. There is a good chance those all would be on this list easily replacing the bottom half.
2009 was the year of the let down. The top 5 are the only I feel strongly about. Here are a few I loved and some just liked slightly more than the rest that came out.
p.s. Up In The Air was purposefully left off this list. I saw it. Way overrated. Go ahead and hate me.