geass and e7 are both very good
i personally like e7 more better but its 50 eps long and its made by bones which has some pretty out there stories but most are ftw
also theres a movei in development
http://www.animenewsnetwork.com/ency...me.php?id=9750

my problem with geass is they start to throw out cliffhangers for the sake of cliffhangers
i hate that
but still good series

gurren lagann and full metal panic are also very good mecha and must sees

if you wanna break from mecha i suggest
death note - suspense thriller
scrapped princess - fantasy
samurai x trust and betrayal - best ova ever. ever
higurashi no naku koroni - pretty good horror with lovable characters
The Tower of Druaga: the Aegis of Uruk - fantasy rpg style with lots of funnys