MySpace comes in a close second. Mostly because they're so big that they have a lot to offer. The MySpace music and MySpace video sections are my favorite MySpace options.
MySpace Music lets you add music to your MySpace profile of artists from all around the world. Add your own music to this large collections of music and let other people add your music to their MySpace profiles.
MySpace Video is a lot like YouTube. You can add your own videos or download other people's videos. Adding videos to your MySpace profile is a lot of fun and helps show off your character.
MySpace also lets you modify your MySpace profile with HTML and CSS whereas Facebook does not.