Gurren Lagann is the most EPIC anime I know. I'm still search for a show to trump that series. I mean seriously, just take a peak at the TV Tropes page of the series. Its HUGE....
Honestly, GL Is will never get old. Its right up there with its big brother FLCL. Pure awesomeness. I say bring GL to toonami. There are still people who haven't seen the series yet. Heh, I didn't even know Durarara existed untill Adult Swim, yeah I know... *kicks rocks*
Anime currently watching:
Hanasaku Iroha , Gad Guard, Birdy the Mighty, Eden of the East, Chromo Shelled Regios