Originally posted by renlish:

It must be your map seed. We get mob after mob after mob on ours. To the point where it's almost become a joke. We just need to step foot in the swamp and abominations pop up all over. Leeches are everywhere. Can't go a few feet without smacking into the smelly armpit of a Draugr. Crypts are a bit light on the ground though, I will admit.

sure that it's 206, not 205? Besides, spawns increasing or decreasing based on a map seed to a point of having two pretty much different gaming experinces sounds highly unlikely.