Too many movies were released to even come close to covering them all, so I'll stick to the most popular films. (and obviously only films I've seen)
Best of 09:
Now these aren't my favorite films of the year, but I believe Pandorum and 2012 are somewhere in the top few. They both had excellent combinations of action, suspense, and drama. The story-lines were original and unique, and it's hard not to enjoy watching a struggling humanity prevail with a new beginning.
Honorable Mentions
Zombieland: If it's not the zombies that make you enjoy this film, the combination of comedy in it will certainly do the job. This film managed to be unique at the same time as being exactly what you want to see in a horror comedy. The humor was fresh and blended well with the occasional grieving, loneliness and closet depression of the main characters.
Paranormal Activity: If you can see past the obvious stunt they try to play of this being unedited footage, and enjoy the movie on its own, the story was well played out and built on the suspense very well. By the end of this one you might find yourself sympathizing with the torment this young couple were forced through.
Law Abiding Citizen: If not a bit far fetched, this movie has a legitimate point to get across and took enough dips and turns to keep you focused throughout the movie. Had a fair amount of action and really kept you guessing the whole way through.
Worst of 09:
Doghouse: Zombieland set a higher standard for horror-comedy, and seeing this after that really brought attention to all the cliche humor. The cliches may have been successful in Shaun Of The Dead, but definitely not this film.
Most Disappointing:
Funny people: I had high expectations of this film. Some of my favorite actors are in this one (Rogen, Sandler), and they played the parts well but the movie didn't live up the the standard of its title. It had it's moments, there was definitely decent humor throughout, but it was smothered by Sandler's clear-cut depression and family issues, which also contributed to a longer than necessary play time.
Fanboys: Being the closet Star Wars fan that I am, and after seeing the trailer for this film, I had high expectations. The humor had its moments and the storyline was feasible at best (considering it was a movie lol) but the script-writing had some major weak points that were hard to cover up. If this movie had been released 5 years ago, I'd give it a 10/10.