....I did a "best 2008" search and didn't see anything, so please forgive me if this has already been done.
I haven't seen Man on Wire, The Wrestler, Let the Right One In, In Bruges, Waltz with Bashir, Che, or Wendy and Lucy, and my gut tells me
Gran Torino, Revolutionary Road, Valkyrie, The Changeling, and The Reader probably ain't so hot anyway (but I might still check out Eastwood),
but here's my top ten (which I'm sure I'll revise as I realize I've forgotten something or some of the promising stuff gets seen, etc.):
Frozen River
The Visitor
Wall*E
The Dark Knight
Slumdog Millionaire
Milk
Doubt
Frost/Nixon
Iron Man
Vicky Christina Barcelona
Yes, these are better than The Curious Case of Benjamin Button, My Blueberry Nights, Synechdoche NY, Happy Go Lucky, and Rachel
Getting Married.
You guys?