My first four will cover anime, split into seasons. Instead of rating them up to a top pick, I'll merely post the ones I enjoyed and provide some commentary. I watched a fair few series this year...
WINTER 2017
SAGA OF TANYA THE EVIL

This comes as no surprise to those who know me, but putting Aoi Yuuki into anything as a VA is a quick way to ensure I'll watch it. A lot of people describe this series as 'Magical Loli Hitler' and they're not wrong. You can argue it as a deconstruction of the Magical Girl archetype, but taken to a different place than something like Madoka Magica. There's a strong existentialist theme as Tanya conducts her one-loli war against God, revelling in every cruelty she can inflict upon the way.
SCUM'S WISH

A romance with a dark twist. There's a strong psychological element to this show, whose premise revolves around the two primary characters engaging in a relationship to fill the void left by those they desire being unattainable. The characters make a lot of morally questionable decisions on the whole, and often revel in the hurt and anguish they cause. But there's a strong undercurrent of personal growth for the main character as well, which I enjoyed.
GABRIEL DROPOUT

The meme anime of Winter 2017. I enjoy wacky comedies, and this one was pretty crazy. The premise of angels and devils coexisting with humanity isn't really new, but the reversal of roles for the characters was quite fun and interesting. And of course, Satania. That character made the show greater than maybe it had a right to. Of course, Gabriel herself paints an accurate picture of a lazy gamer... Gotta bust that butt for microtransactions.
KONOSUBA SEASON 2

Gabriel DropOut may have been funny, but KonoSuba was legitimately side-splitting. Unfortunately as is often the case, Season 2 wasn't as good as Season 1, but it was still a very high-tier romp, with gag after gag being thrown at the viewer and nary a moment of let-up. The animation itself is famously awful and gimpy, but that's part of the appeal. It's absolutely silly and knows it. And that's why we love it. Fun fact: spamming Turn Undead is love, spamming Turn Undead is life.
MISS KOBAYASHI'S DRAGON MAID

The other meme anime of the season. It's much more slice-of-life than it is comedy, but the fish-out-of-water vibe for the dragons, as well as the ensuing hijinks that they get into made it a fun watch. Fafnir's dour, hostile view towards humans on that first phonecall was what sold me. There was also a strong theme of personal development among the cast, which is always welcome.