Current NF cycle: The Book of Five Rings (Miyamoto Musashi), The Seven Daughters of Eve (Bryan Sykes), Quantum Mechanics: The Theoretical Minimum (Art Freidman, Leonard Susskind)
Yeah you're actually probably right about GiaS. I think the tanks are more of a sci-fi thing than random anime thing though.
People absolutely love LoK. I thought it was nothing compared to TLA though. The animation and music are definitely supreme and I love a lot of the characters. The plot is stale though imo, and as Sword said, it's very rushed. They tried to fit way too many too many things in the first season and it just wasn't buyable. Also the voice acting is really bad, particularly Korra's which is just garbage imo. I personally enjoyed the last season the most.