I enjoyed Brotherhood a lot - the original FMA, too. Attack on Titan is good aside from the bit halfway through the first season where the pacing falls apart for 3-4 episodes, and the melodrama can get to you. HunterxHunter is fantastic up until the Chimera Ants arc, then the pacing becomes abominable, although I do think the York Shin City is one of the best shonen arcs I've ever seen. Death Note is great for the first half and then the second half is good but feels a let-down in comparison. Jojo's Bizarre Adventures is a lot of good fun - silly, but enjoyable. I mildly prefer S2 because I preferred more engaged fight scenes than the distanced stands, but that's about it. Cowboy Bebop and Samurai Champloo are both fantastic - I might be slightly outside the ordinary trend by mildly preferring Samurai Champloo. Got bored with Naruto, I like plots to have resolutions after a while and I just lost interest with the characters. Never tried One Piece or Bleach, I have a feeling I'd have a similar reaction as I did to Naruto. Hellsing was just... too try-hard? I sort of liked it but every episode was "look how much blood there is in this episode! Look at Alucard doing mature, R-rated things! hey, boobies!" and it put me off after a while. Kill la Kill just seemed childish.
I think that's most of the things I've watched. Never watched Gurren Lagann, actually, so may have to try that. Nor Ghost in the Shell, which I've heard is reviewed pretty highly. I watched a little bit of the Fate series, but the first episode didn't really sell me and I didn't continue - but I know that's not really enough to give up so I may return to it with some encouragement.