Growing the Beard: The second season is largely considered superior, due to actually having a continuing story, better Character Development, a darker tone, and not just being Moe moments and comedy like the first season.
At least in Anri's mind towards Tsukasa. At one point, Anri makes a sign appear over her head that reads "For Tsukasa-sama's exclusive use" with an arrow pointing towards herself. And of course she makes sure that Tsukasa sees it right away.
Misao and Sasami have these vibes.
Itoki kissing Washu outside the karaoke in episode 14. It was even Washu's first kiss...
Also Misao of all people in the second season for her unproven beliefs of the Obviously Evil witches just being mistaken about them attempting to kidnap them, next siding with them and becoming a huge asshole.
Superlative Dubbing: FUNimation's English dub is VASTLY superior to the badly acted and nasally-sounding original Japanese version. My God, even for child actors (in the Japanese version), they all sound like they have vocal chord paralysis, Kozue and Makoto being the worst victims of this!
Tear Jerker: Episode 10, the episode where the girls meet a little girl named Asami, whose parents died. This causes Tsukasa to remember her own dead mother, and in the end Asami and her grandfather move away, but not before Asami gives her special bunny rabbit, given to her by her parents, to Tsukasa. Then, when they use the memory potion on the rabbit, the memories are all of the girls, as opposed to her parents.