OP, nothing personal man, but i do think you should watch less mainstream shows. There are a lot of great series' that don't get the recognition they deserve. I can't really say best of all time right now, but I can do what I consider my top 10 from last year alone.
1. Kemono Friends
2.Land of the Lustrous
3.Little Witch Academia
4.Blend S
5. Scum's Wish
6.Konosuba S2
7. My Hero Academia s2
8.Attack On titan s2
9. Ero Manga Sensei
10.Blue Exorcist Kyoto Arc
There are still some shows that I didn't get around to watching as well, so it might change eventually.