My all time favorite movie is without a doubt "High Fidelity". Really entertaining, solid cast, with interesting views on relationships. The other nine I'll list are just others that I really dig, in no particular order. Could be because I really enjoyed the plot, or had some emotional investment in them.

2. Warrior
3. My Life As A House
4. The Breakfast Club
5. No Country For Old Men
6. 500 Days of Summer
7. The Dark Knight
8. Phenomenon
9. Dredd
10. Old Boy (the original, the South Korean version of the film)