This is a bit late, but Stuart Murdoch of Belle & Sebastian last month listed his Top 50 Films of the Decade. I've seen all of his top 10 with the exception of two. Good to see Ghost World on there. For brevity, here's the top 25.
1 Gosford Park
2 Amélie
3 L o s t i n T r a n s l a t i o n
4 O Brother, Where Art Thou?
5 E t e r n a l S u n s h i n e o f t h e S p o t l e s s M i n d
6 The Royal Tenenbaums
7 The Squid and the Whale
8 Almost Famous
9 The Lord of the Rings: The Fellowship of the Ring
10 In the Mood for Love
11 Secretary
12 Sideways
13 Charlie Wilson's War
14 The Son's Room
15 No Country for Old Men
16 Mulholland Drive
17 Talk to Her
18 Ghost World
19 T h e A v i a t o r
20 Persepolis
21 Burn After Reading
22 Me and You and Everyone We Know
23 The Devil and Daniel Johnston
24 Munich
25 Milk