Does anybody have any anime they feel are 'hidden gems', completely overlooked, forgotten, unknown, but well worth your time? This idea crossed my mind as I've just watched Honto ni Atta! Reibai Sensei, which I only found due to an odd character design in the quiz game here. That anime was practically a flash animation, but I haven't seen anything that funny since Arakawa Under the Bridge.
A few others I could point out are Kodomo no Omocha and, very oddly, Colorful. Kodomo no Omocha is another great comedy series based on a manga of the same name that aired well over a decade ago, and Colorful is actually from 2010, with superb animation and a gripping story. It caught me off guard, as it even has several thousand views fewer than The Sky Crawlers, and less than half as much as Eve no Jikan, even though it easily belongs alongside them in terms of quality as an animated movie around those few years.