Fantasmic! v4.0 is based on Disney's Fantasmic! nighttime show at both Disneyland in California and Disney's Hollywood Studios, Florida. In this forum-based role play game you are free to take on the role of any Disney character EVER! This is the most successful PURE free role play (the players control the story--not the GM's) site I have ever seen. Like the Menagerie series that I was part of, Fantasmic! has had several renditions--this being the fourth.
Heroscape: The Battle of All Time is my absolute favorite miniatures (2 in. tall plastic figures) board game. The rules are fairly simple (although a fellow player could explain them simpler than the rule book does...) and the system is extremely easy to learn! What makes Heroscape unique is the terrain (map). In Heroscape you build the map you play on using plastic hexes that click together and stack. It's like LEGO's meet D&D minus the clan of weekly meetings and dialogue. This game does not have to be played as an RPG, but simply as a regular board game akin to Hasbro's (formerly Parker Brothers') RISK. There are 4 different Mastersets to choose from.
Rpgmenagerie.com ~The Menagerie! This is the absolute greatest PBPRPG (play-by-post rpg) series in existence! Renquist/Grayell has lovingly developed each site from scratch and is a mastermind genius when it comes to pbprpg's. This iteration does not have any stats and combat is based entirely on role play. Sometimes a GM will have you post an attempt and then he will determine the result, but other times he will simply provide an enemy and let you defeat said enemy as colorfully as you want.
World of Warcraft (WoW) is an excellent MMORPG (Massive Multiplayer Online Role Play Game) and I guarantee that you know someone who plays... they probably just never told you.
Runescape is a free knock-off of WoW and LotRO (Lord of the Rings Online) is the J. R. R. Tolkien version.
Dungeons and Dragons (D&D) needs no introduction and is often stereotyped. $40+
League of Legends (LOL) is a FREE Multiplayer Battle RPG and a current favorite of mine. =D Please try it!