SanCom is a mini 4chan to me.
I like SanCom for its random Japanese (and Chinese lol) stuffs. Learned quite a lot on disturbing cultures... and netizens in general.
I've only been around for about a year, though. I dunno if I will someday get bored and move on.

China Elevator Woman “Starved To Death Over Month”
Goddess of Twitter: “Flat is Justice!”
Masami Ichikawa’s Star Debut SODding Flat
KanColle Arcade Trailers Hit The Water
Koyomimonogatari Absolutely Succulent