I only know Haruhi from your list... but I saw Lucky Star and Azumanga Daioh on other lists, so... I guess look these up and see if they interest you:
Hidamari Sketch (1st season, x 365, x Hoshimittsu, x SP; also, x Honeycomb is currently airing in Japan, so it'll be... mm, some time before it's released over here)
K-ON! (Season 1 vol. 1-4, Season 2 Collection 1 & Collection 2)
A Little Snow Fairy Sugar (Collection 1 & Collection 2)
Squid Girl (Season 1 (has 2 parts, which can be purchased separately or together); also, Season 2 is to be released at some point)
Strawberry Marshmallow (vol. 1-3)