I found out about this show at random and watched season 1 & 2 back-to-back and I was so happy to know they are making season 3.
It phenomenal and as much as I want to continue the story reading the Mangas if they exist (never looked into it) I am more then happy to wait for season 3 to come out will all the effort they put into it. As I said on my review of season 1 it has a very Rurouni Kenshin vibe but a less superman type feel behind the main character.
Animal lovers beware they are still more then happy to kill, "chita-chop," and eat anything that moves on all fours or swims in water.
If your looking for a more serious vibe in an anime without some wussbag teenage highschooler as the protagonist this is for you. Nothing but brutal battles and a driving story done on a very humanistic level. If someone dies more then likely it will be in a way you havnt seen before in the show. No repeat bulletholes here. Faces will be ripped to shreads, human skins with be carved off out to create a map, and your love for the show will rise.