Myself and a friend just messing around, first world we went in we lost the plot with creative, TNT houses don't last long. Second time round we just played it as survival, far much more fun.
Found a village so decided to make what was at first, a small castle behind the village. Now it totally encloses it and the village population has trebled..they're worse than cats.
The nether fire ring is to keep spider off the walls.. Still a work in progress
The batcave beneath..