Attack on Titan was good if you can get through the first six or so episodes. When the Battle for Trost starts, that's when it actually starts getting good. Knowing that season 1 only covered about half of the manga so far really helped reconcile the ending. And the good news is they are going to have a second season, but it won't start until 2015.
AoT was good, though. Eren grows on you and Mikasa is an awesome character. The later parts are super intense, the animation during the battles is absolutely gorgeous, and the soundtrack and score are just beyond phenomenal.
However, as good as I felt Attack on Titan was, it cannot compare in the slightest to Kill la Kill.
Kill la Kill is an anime I wasn't sold on just seeing gifs and pics on Tumblr. But, my wife has a friend who was obsessed with it, so she took a chance an watched it. I started watching with her around episode 3. Next thing I know, it's 7 in the morning and I've watched the entire series in one sitting.
My wife wakes up and we start where she left off (episode 14) and I watch it a second time through. Then, I find out about the dub and start watching the episodes they've done so far.
Then I get both soundtracks and track down the intro and closing themes, as well as remixes of the various songs and covers.
This anime is beyond fantastic. It starts off as a goofy, over-the-top satirical take on the Magical Girl genre and evolves into something incredible.
There are scanty outfits, but they're utilized for a plot related reason, and a major theme is that, at first, Ryuko is ashamed of her body and how she has to be on display to achieve her full power. Then, as she starts to take control of things she comes to accept that she doesn't need to be ashamed of herself.
Ryuko's arc is one about revenge and self-confidence and it climaxes in I think Episode 21 with what I feel is the most emotionally powerful scene I've ever had the pleasure of witnessing. Just thinking about it, I'm tearing up. The entire story revolves around a lack of control, around freedom through submission. And Ryuko's crowning moment comes in the moment she finally takes control, when she finally reaches out and takes hold of her agency, tearing apart the physical and mental shackles that have bound her up to that point.
Then there is Satsuki. I can't go into too much detail about Satsuki without giving away major plot points, but god. This girl is amazing and perfect. She seems like the antagonist at first, but she evolves into the deuteragonist by the end and her arc is just to die for. She had the most epic moments in the series, I would say, and definitely got me on the verge of bawling (but Ryuko's crowning moment of awesome takes that cake).
The supporting cast is fantastic. The villains are horrific and incredibly well-written to act as lightning rods of hate. The climax is fulfilling, especially once you understand the point of Ryuko's character arc.
The show is never dull, always funny, fast-paced and full of action. Hell, they even do the "Story up to Now" episode in about two minutes in the scene before the opening credits, which Senketsu laughs about saying "Even Kill la Kill's compliation episode is fast-paced!"
Being a satire, it pays homage to other shows, past and present, brilliantly. But, despite being satirical, by the end it has taken on a life of its own and you can't resist taking the ridiculous story seriously.
The subtle and not-so-subtle themes of sexuality, nudity, objectification, submission and domination are consistent and especially powerful on a second or third watch through.
Not to mention the soundtrack is bar none my favorite soundtrack/score in history. Guren no Yumiya from Attack on Titan is a contender, but Kill la Kill's entire soundtrack is just brilliant and moving.
I love literally everything about this anime and cannot stress it's beauty enough. It is my favorite anime of all time.