Well I like Highschool Of The Dead And Hellsing the best...but there's a lot of them like Elfen Lied, Wolf's rain, Higurashi No Naku Koro Ni...I could go on and on for hours lol I basically loved almost every anime I watched
On the outside I may appear like an emotionless sarcastic piece of shit, but just like an onion, when you peel off more layers, you find the exact same thing every single time and you start crying.
I like mechas, i love basketball, so certainly Basquash, or Gurren Lagann, both anime are very short, maybe 20 amazing episodes, after that probably Reborn, (i watched just the 90 first episodes, and it was pretty good and so funny)
Shiki, Darker than Black, Darker than Black: Ryuusei no Gemini, Bleach, Fairy Tail, Allison to Lilia
And my all time favourite - DEATH NOTE. My first anime and holy duck on a stick, I can't count how many times I rewatched it. At least five. I just never get bored. Even though a lot of people say the second part of the series is a little boring (25-37), I think it's still good. Well, maybe because I didn't really like L.
I'd probably add Attack on Titan, but it's just so frustrating to watch when you have 1 episode for a week. I started watching when it already aired like 10 episodes, and I watched it in 2 days. But then when I had to wait a week for a new episode, I noticed how some episodes are pointless. Like this episode when Eren drops a spoon and he changes into a Titan, and that's all. Nothing else happens in this episode. A huge, pointless flashback when something way more interesting happens. I just can't.
EDIT: OH! And Avatar: The Last Airbender. Not a big fan of Korra though