>>2132Knights of Sidonia is a good enough Sci-fi show for the most part, although the animation is terrible, and the later half feels rushed. The manga is better until it turns into harem-shit.
Chaos;head isn't that good, you should watch Steins;gate before you sink any time into that. Steins;Gate however is one of the best shows ever made, and a very faithful adaption. Many fans prefer the Visual novel for better art and being a visual novel, but The show is quick enough to watch.
Noragami is pretty recent, and it's decent. it's not that memorable tbh, but it doesn't do too much wrong.
FMA is the archetype of a shounen show. it's a somewhat lengthy series, and there more than a bit of silly stuff in it. There is some cool stuff going on in the universe, and there are also a few very mature and somber moments.
Honestly though, if you're committed to watching anime legally, a) you're not getting the best quality anything, be it audio, translations, typesetting, or what else, and b) your shit is going to be extremely limited.