McBlocks is a nice community where the staff and players get along well.
McBlocks has two servers, a Creative server (c.mcblocks.net) and a Survival server (smp.mcblocks.net).
The server has different ranks. You start off as a guest. To get builder you must show you will follow the rules and you must have played for a small amount of time.

Rules:
No Griefing
No inappropriate Structures

Owners:
moss_crow, chrisbs and woder22