After years of watching Naruto, filler episodes have never really phased me, but now I definitely give them a pass because plot episodes in AT are far denser than I ever give them credit for. I usually reserve post-episode analysis reading for shows like Mad Men, but I
highly recommend paying attention to
/r/adventuretime's Episode Discussion threads. Everyone on the subreddit seems to have an encyclopedic knowledge of the universe and it blows my mind how much stuff I would miss if it weren't for these threads.
I'll probably give SU another 10 eps like you're suggesting.