If you're going to play it multiplayer, then yes, try it -- there's a pretty good chance you'll love it. Play some of the game's original levels, then go online and explore all the crazy games out there. People have made amazing things, from remakes of old games like Lunar Lander where you pilot around a rocket-powered spaceship (it's hilarious in multiplayer) to really unique story driven games, to sick and twisted obstacle courses.
The best thing is just jumping into a highly rated level at random and going exploring with a friend or two -- you never know whether you're going to be playing a shooter, a platformer, a puzzle game, or something unusual and strange. LBP is an amazing game... and if you end up not liking the levels you play, you have two choices: try another level hoping for something different, or return the game... no big loss. Definitely worth a try.
