Grumble Grumble Grumble
I take it that this is from the 'American' Anime fan viewpoint. Several of the series listed did not do well in their original Japan release. 'Samurai Champloo' during its first time TV showing was prematurely canceled after episode 17 due to poor ratings in its post-midnight time slot. 'Trigun' was also was not considered a successful series and actually did better in its US release, so much so that the 'Vash the Stampede' figurine was only sold in the US market, and not in Japan.
Also, if these series are the 'literature of anime', then why is 'Spirited Away', the only anime feature to take the Oscar for best Animation film missing from this list???