Kavinsky, I have to disagree about your opinon on classic zombies. Although, they are the average type, what makes them effective, in my opinion, is the more hp than the predator/fast/poison. Of course one cannot be independent, however, with hordes of these noobs as classics...I have to admit, it's really challenging.
The noobs prove useful in some circumstances as long as they are working as a team to bring a barricade down.