mcmmo retains every part of vanilla gameplay. The difference between a vanilla and non-vanilla server is that a person who has done nothing but play single player pure vanilla minecraft can hop into a server with plugins like mcmmo and play the game the exact same way, and so does everyone else on that server.
That is not the case with real vanilla-breaking plugins that add stuff like factions, towny, prisons, minigames, and all that other stuff.
I have a server we could play on with a great bunch of guys. We are between 24 and 41 years old. As of now we are running snapshot 14w08a. Email or PM me IGN to get on the whitelist. Not on Skype all that often, but have a Mumble server for in game chat.
IP: 126.96.36.199:25565 . http://www.minecraft...coop-community/