You don't pay us anything for playing. The best thing about NannyMUD might be the people attending the game. Several people have met their real-life spouses here. The choice is yours. The game is friendly to the newbie, with extended help available in the Newbie Booklet which everyone starts out with.
Many players are nice and helpful to newbies, too.
Dedicated host NannyMUD is run on a dedicated, very powerful, host, with lot of resources to spare. The NannyMUD lib is both powerful and flexible, with a wide variety of objects. The lib uses abstraction, hiding internals from the user in such a way that the objects can be updated and improved without breaking existing code. You can basically create an ok area without writing a single line of actual code. All you have to do is to fill in templates.