Recommendations Special: Railgunfan75's Anime Favorites A-Z Challenge

I loved the idea of this challenge the moment I read it. In brief, one chooses one favorite anime for each letter of the alphabet; titles must be consistently either in the original style or in the official English translation (I picked the original titles), substitution is allowed on a limited basis for missing letters, and explanations with pictures if possible are preferred. While I can't embed pics, the rest is doable.

In general, shows with completed plots beat out incomplete but excellent shows, personal taste beat out objective quality, and the ability to watch a show with friends and family beat out solitary enjoyment - although all of these had exceptions. I've added runners-up and honorable mentions when I felt it necessary, as well as translated titles when available for clarity. I've excluded movies, shorts and OVAs from consideration, and marked singular seasons and particular versions as needed. EDIT April 2022: I've watched quite a few more anime in the last two years, so I'm adding (and occasionally subtracting) recs - they will be at the end of a letter marked with EDIT.

( A is for... )