First of all, I did see Zombieland. It was worth every penny. It doesn't compare to Shaun of the Dead. It's not a comedy based on personal relationships. I know it may sound stupid, but it seems to be more of a Zombie Midnight Run. You have the asskicker who's running from his ghost, his nebbish nemesis/tag team partner. You have the disruptive force. (Though one would have to consider Emma Stone as someone infinitely more attractive than John Ashton.)
And this movie actually earns emotional moments as it comes to the end of the movie. I give it a 13 out of 5. It was that good.