I like how he thinks they're weird but he can't help but admit they got some good ideas. And they really DO have some good delusions.
Also, no one's gonna ask who came up with the Tadano-kun-chan one? Because that guy has interesting tastes...
I love that he's still hanging out with the riverside pervert trio. It's nice seeing him have friends who aren't part of the group shared with Komi, just like how nice it is to see Komi still being friends with shogi-girl and yoyo-girl.