So I have a question slightly related to this then. I started up a survival map and spawned near at least 3 separate packs of wolves. I picked a nice place close to one pack and made my home. In four days I have seen one spider, and it was gone by the time I reached it, that's it. No zombies, no skeletons, no creepers above ground. I can hear some zombies below ground though and have seen on creeper in a cavern. I have slept all but the first night. What is causing the lack of mobs? I am playing on Normal.
Never mind, I figured it out. NOOB moment. I was going to sleep before the spawn time.
Now I don't sleep and use the bed to set spawn only. I even stopped using my house and just set up a few torches and stand in the middle, attacking what ever comes near. I make sure I have a clear runaway path if it gets a little overwhelming.At the moment I only have Iron leggings and the rest is leather.