I was close to dropping Nichijou after the first epsiode - you could say it's Azumanga on crack, but I didn't like the cast nearly as much as Azumanga or Lucky Star's.
I was close to dropping Nichijou after the fourth episode. Cannot stand how Prof. abuses Nano. But images from Suguru's entry seem intriguing enough to limp along a bit more.
BTW, for some reason I was surprised to learn that "nichijou" is actually a word, from Railgun, no less. In ep.2 Saten says "自分の日常に戻りたい" == "I want my everyday life to return". I thought it was some kind of made-up word, like "hagedou" ("禿同" - note the wrong kanji for "激しい").