I can tell you with certainty that it's CLAMP and memes are why Geass got big, and Kimura had a small part in making it pretty. It's a shame because I would've liked one more oringal animaton before he left us but Geass was just too big for him to escape.

>>23538899
I assume that list doesn't count his lewds since he's done a good deal, even outside of Viper.