The reason behind there being so many Code Geass threads is the fact the show can create shitstorms with the smallest things.
The writing, art, studio, popularity and pretty much everything about the show can be argued about so easily. Not to mention, due to those things, the show can be unintentionally hilarious at times.
Basically, many of the things that make up Code Geass can bring out the best and worst of /a/. Worst being way too many threads, and best being things like the Suzaku Wallrun, or the Lelouch/Suzaku shoop thread from today.
I think it's fun. I'd much rather see the best and worst of /a/, than constantly see /a/ just being 'average'.