Okay, Out of MANY animes I've seen, this is perhaps the best.
Tengen Toppa Gurren Lagann
Story is about a Boy named Simon who finds a drill thats the key to a special mini robot which Simon and his "aniki" named Kamina, call Lagann. The surfae world is barren, and not many humans are living there. To keep humans from the surface, the beastmen, pilot giant robots which they call Ganmen, and these beastmen are led by the Helix king and his four generals. When a Ganmen falls into Simon's village, a young girl named Yoko shows up with her sniper rifle to take out this ganmen, and Kamina and Simon are led to the surface world.
Now I dont wanna give out TOO much info, this is a very unqie anime made by "Gainax" the people who co-produced FlCl and other animes.
Check this anime out, It's Tengen Toppa Gurren Lagann