Gurren Lagann and/or Fullmetal Alchemist are good if you like shonen at all. FLCL is the clearest glimpse into the nature of adolescence I've ever seen in an anime (with good music), The Melancholy of Haruhi Suzumiya is extremely fun to watch, Paranoia Agent is filled with interesting visual trickery and Excel Saga is just really insane. All are highly recommended.

Also, you really ought to see Denno Coil, if you can find it.

EDIT: On top of all that, TEKKONKINKREET! The visuals are excellent, the soundtrack is awesome and despite some pacing issues and a confusing ending it is certainly worth watching.

I was a little bit skeptical until I saw this:

http://www.youtube.com/watch?v=hfAzKVAmL40

Then I saw this:

http://www.youtube.com/watch?v=wNyA3oJRIDA

Yeah, Soul Eater isn't just another generic shonen title. It's a shonen title with crazy Halloweenish visuals starring a girl with a transforming scythe.

Niiiice.

Does anyone have Wildcard made by Acey?

It was a really neat RPG Maker 2000 game released a while ago back when the actual Gaming World site still existed. It's sort of the Dragon Quest VIII of RPG Maker, except only ten hours long and with RTP graphics. Then again, nearly all the graphics are RTP, and it's used really well, so...

Tekkonkinkreet!

It's quite unusual, and there's a lot of violence and stuff. But it's really awesome. I'd also recommend Lone Wolf and Cub, as well as Buddha and Pheonix by Osamu Tezuka.

Oh, and Fullmetal Alchemist too, but I'm guessing you're already reading it.

La Mulana. The Hell Temple.

http://www.youtube.com/watch?v=eY0IH80cHB0

"Make the hurting stooooooop!"
-Deceased Crab

Don't worry.