I find GochiUsa S2's OP to be much more dangerous, though the dance moves in the ED get stuck in my head (considering who voices bluey, that doesn't surprise me). Cuteness aside, I also like how it still has something of a tiny conflict each episode, like bitterness before coffee soothes you. But I'm still waiting for the story where Syaro stops chasing Rize and falls into Chiya's arms.
Yeah, never noticed you weren't on my list either. I actually never use it.
I'm going to watch some older anime with her that I haven't seen. Tokyo Ravens seems like a good start, she has a major role in this apparently. Was hoping she would appear in Owarimonogatari, but Nadeko's story is done so few chances.