I am probably alone here but IMO 28 days later sucked ballsac, although the sequel looks pretty good. I do love zombie movies though, Zombie from the 80's is a really good cheeze ball 80's one.

Slow moving zombies are scary because it is like being chased by a glacier. It may be going very slow but you are not gonna be able to stop it. You can just run away until there is no where else to run.