Finally we start our list going from the very back.

100. Mobile Suit Gundam
Going back to a simpler time where giant robots were everywhere, story telling in this genre changed with the arrival of Gundam. Taking the formula to a proper gray area war.

99. Nadia Secret of Blue Water
Adapting major western novels is no easy feat and Nadia keeps it authentic to the source material all the while playing up the spectacle.

98. Noir
An intriguing mystery plot revolved around two hired guns set to the backdrop of Noir Europe more than earning it's title and one of the best soundtracks to grace an anime.

97. Segua Hard Girls
I'm a pretty big Sega fan and this mini series became a no brainer for this list. The characters are adorable, the comedy is fun and it really leaves you in a good mood.

96. Astroboy
The Tezuka classic that's often considered the first proper anime series. It's story has been through multiple redesigns but always seems to stand up well, even in the modern era