>>187699These are all top tier (to me):
gdgd Fairies S1 + S2
hi*sCoool SeHa Girls
Gakkatsu
Teekyuu S1 through S7
Danna ga Nani S1 + S2
Wakaba*Girl
Wakako-zake
These are ones I've also enjoyed:
Bottle Fairy
Pupipo
Kanojo to Kanojo no Neko: Everything Flows (Or "She and Her Cat")
Honobono Log
Kuromajo-san ga Tooru (Only watch this if you're okay with how repetitive children's shows plots are as well as really liking magical girls)
Komori-san wa Kotowarenai!
These are collections of works and some might be a little arthouse, so be aware of that:
Batman: Gotham Knight
Genius Party + Genius Party Beyond
Also suggesting these series others have said:
Inferno Cop
Luluco
Di Gi Charat
Sekkou Boys
Galko-chan
Boku no Imouto wa Osaka-okan