It's hard to explain this strange but awesome mess of an anime but i will try anyway.
FLCL is one of those shows that can entrance you from the start. It's crazy, fast, nonsensical but it has something at it's core. At least for me.
It centers around a normal kid living in a normal and boring town. But all of that changes when an insane girl on a scooter whacks him on the head with her guitar.
After that all kinds of crazy things start to happen.
Epic robot battles, imminent doom from a baseball meteor.
Giant desperado robot with a huge shotgun that rampages trough town, and much, much more crazy stuff. And it all ends in an awesome showdown.
I'm not going to say anything else except that you have to check out this show. It's really hard to explain why it is so awesome. I guess it's something like a general feeling of just having watched something crazy and awesome at the same time. So try to find this show! it's not hard to find if you know what torrents are ;)