Well, /co/ was a very different board at the time. This was before the dark times. Before the colored horses empire.
We still moped and whined now and then but- we could have conversations. “/co/ is Love” still applied back the.
Adventure Time in my memory- it was something new. The biggest criticism leveled against it was “LOL Random humor!!!” Which was a common insult hurled at a lot of cartoons right then with everyone saying a show was trying to be the next “Invader Zim”. Nowadays we call shows “Cal Arts Sugar Scum”, Times change insults but knee jerks remain the same.
A legitimate criticism could be that the show was supposed to be about adventures, and any episode that did not highlight that nature was failing to live up to the name. The first episode came out about the dock gauntlet and people were “Ehh. I’ll stick around.”
Pre-airing, again, the lol random criticism. But with pro-show comments, people were all up for something NEW. The “CN Real” fresh in our minds and for a while we really felt like it was going to actually be called “The Network” instead of “Cartoon Network” anymore.