The zombie classes that we have now are great, but I have an idea which I believe will increase the number of people who purchase donator/admin (more money for PF), as well as making the game significantly more enjoyable: custom zombie classes. I propose making customized zombie classes with the attribute system. Default users would have 5 attribute points that they could distribute into several attributes such as health, knockback, speed, fire resistance, jump, etc. To become a half zombie, a player would have to spend 3 attribute points on the half zombie. Donators would receive an extra 1-2 points and admins would gain an extra point for each level of admin they obtain. Let me make clear that there would be no "leveling by experience points." Food for thought.