Natsume's Book of Friends is startlingly middle of the road for a show with five entries in the top 100. It's not bad or good. I enjoyed some episodes, but I'd rather be watching Mushishi.
I'm loathe to say it, but Fate/Prisma Illya is getting better. I wouldn't recommend it to anyone who doesn't want to go to hell, but instead of being boring, it's actually become pretty funny, often at the expense of the original source material. It seems like between this and Oath Under Snow, they actually have a really good understanding of Fate/Stay Night. I just wish they would make an actually good spinoff show instead of going out of their way to pervert the franchise literally and metaphorically.
My Hero Academia lives up to its potential much more in season 2. The hero killer arc is really great. It's not the best battle shonen yet imo, but it's easily one of the most entertaining shows I've watched on this list.
I wondered where Legend of the Galactic Heroes could possibly go after season 2, and I'm only more confused as to where it will go after season 3. It has its moments, but it feels like it peaked early, kinda like Death Note. It just never feels as spicy as it did during seasons 1 and 2.
Haikyuu improves quite a bit. It adds a new female character who is great, but then it ramps things up in terms of action. Haikyuu is all about build-up and payoff, and the two matches against Aoba Jousai are easily the high points of the series so far. While I don't like it nearly as much as Hajime no Ippo, at least this show steadily gets better, where Ippo only got worse.