Since it season is ending, I will name my favorites anime from fall 2018 who ended because I don't like praising show who are still airing, you never know maybe they will turn into crap at some point!
So it has three anime I really liked.
SSSS.Gridman: I never watched the original show and it has probably 1 billion references I didn't get. I am not that big into mecha show, but I really liked it one because of the characters. They are very likeable and the show has some interesting themes. Akane is definitively the kind of character I would like analyzed for the rest of my life.
Zombieland Saga: Well I am not into idol show too but this is one caught my attention because of it ridiculous premise (come on, ZOMBIE IDOLS). Once again the characters are likeable, the jokes works and it has a good balance between sillyness and drame thought towards the end I was a bit tired Sakura past two episodes depressive even if I understand why she was likes that. The problem is that she was all 'that idol project isn't going to work' and it has already 2 previous episode where one of two of the girls were like that so having 4 episodes in a total of 12 where one or two girls decide the project is doomed end up kinda repetive. Still I hope it has season 2 since some plots and mysteries aren't resolve.
Kishuku Gakkou no Juliet: A rom-com where two teens fail in love but because their countries are enemy, their love is impossible. So yeah that a Romeo and Juliet kind of story, but what I really liked is from the first episode the main characters admit their love to each other so that feel very different from other romantic comedy anime I had watched where it seem to get forever before the characters admit their love (assuming they even go that far). The main couple is really cute and the jokes mostly works. It has some fanservice so that maybe no for everyone.