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Done 8)
Most Underrated Movie of the Year: Grindhouse
Trippiest Movie of the Year: Grindhouse
Best Horror Movie of the Year: Grindhouse
Coolest Character(s) of the Year: Stuntman Mike - Grindhouse
Best Music in a Movie: Grindhouse
Favorite Movie Poster of the Year: Grindhouse
Best Trailer of the Year: Grindhouse
although Grindhouse was not underrated, but undervisited 
I would say it was under-hyped. A bit more marketing before it came out and it would have done much better.
Anyway, I voted. ;D