Where the freak is the Eureka 7 love!? OMG, how can you guys not have seen it? It's made by Bones, the same studio responsible for FMA, RahXephon, Ouran High School Host Club, Darker than Black, and other pwnage anime. I feel deeply insulted and possibly emotionally scarred for life. As for my list:
1. Eureka 7 - Incredible mecha that is so much more than a mecha. It's got some of the sickest mecha action ever and the coolest cast of characters ever. The plot... wow.
2. FMA - I really have to explain this one?
3. Ouran High School Host Club - The most ROFL anime ever. Watch it NAO if you're into comedy.
4. Busou Renkin - Just a great anime that is just intangibly amazing.
5. The Melancholy of Haruhi Suziyoma/FLCL - Once again, these don't need to be described.