Off the top of my head.
1. Shaun of the Dead - It's been my favorite movie since I first saw it six years ago.
2. Diary of the Dead - Don't even care, it's my favorite George A. Romero movie. I like the idea of a found footage zombie movie and the commentary on our reliance on social media.
3. Dawn of the Dead (original and remake) - I love both equally.
4. Day of the Dead
5. Land of the Dead
6. Dead Alive - That lawnmower scene!
7. Undead - An Australian zombie movie that I thought was pretty entertaining.
8. 28 Days Later
10. 28 Weeks Later
Zombie Strippers - This was an awesome purposely bad B-movie. Plus, you can't argue with Robert Englund being in it.
Planet Terror - Rose McGowan with a gun leg?
Return of the Living Dead - Punks + Zombies was pretty cool.