I feel like I'm one of the few people here who loves 4chan primarily because I get to talk about cartoons without restrictions. Using a place with a username, like a forum, just guarantees that it will eventually turn into a circlejerk where if you say one opinion the majority of the userbase disagrees with, they'll shit on you and all future posts will be followed by people refusing to read your shit because (you) said it. Trying to enforce enough rules to prevent that, like ToonZone, results in sluggish, dull, conversation.
4chan also attracts people of all minds. One person here might think How To Train Your Dragon is the best shit ever while someone else might think it's the worse and they're both of equal value. Whereas again, on certain sites, the majority of an opinion rules and if you disagree, you're the odd man out. Shows like Steven Universe can both thrive and suffer on /co/. It's actually refreshing. I fucking love being anonymous and talking to other anons.
The only real problem this place suffers from is an obsession over "waifu" stuff which results the lack of discussion on certain cartoons that have too many guy characters, like Pig Goat Banana Cricket, or too many threads that are just, "This is ____. Say something nice about her!" or "___ is cute. CUTE!".