first seed was great. destiny was ass. but seed was fine. if seed sucked then no one would be complaining about destiny .. just think about for a sec. people are pissed cause seed was great (ending sucked but overall) and destiny was ass all the way through
as for otaku or not .. i'd say that none of the shows i mentioned are really for otaku per se ... otaku shows usually suck .. they try to milk the moe factor and that's it ... i think otaku genres are the ero game genre .. and it's usually a let down .. i think tsukihime let me down .. it could have been great .. but ended up mediocre ... air was pretty ass all the way through besides production values and ost ...
i thinkn of an otaku show as something that really doesn't have much draw outside of having really moe characters and some ero game background ... and so far i can't really name any animes that were good and made especially for otaku. why? well because if i know i can sell my shit anime to otaku regardless of quality .. i'll just decide to make a shitty anime with cute characters and make otaku buy it .. why make a story or bother with character development? otaku will still buy shit ...
and the problem with comparison is that miyazaki makes movies ... these are anime series .. quite different ... movies are usually 120 minute deals with high budgets ... i believe actually making a good story /developing characters is much more important than "artistic value."