Dead Leaves, Tengen Toppa Gurren Lagann Recommendations
Over-the-top action, mostly unexplainable knowledge of technology when it's really needed, and characters that are instantly lovable (Kamina from TTGL, and Retro from DL).
Same Staff, almost as crazy, and share somethings that you will notice.
Production I.G. and Gainax both worked on FLCL. Both share over-the-top action and sexual imagery (giant drill, anyone?).
Both from Hiroyuki Imaishi-
-crazy over the top action
-unique art style
-fast paced, quick cuts