**This review is done by a guy who watches/plays a lot of action/violent movies, games and anime... and yet the dumbstruck reviewer finds the prominent theme of Parasyte to be way better than just mindless fighting.**
Parasyte is something of a one time enchantment. Just one season and thats just it. Its something you get when elements like action + sci-fi + gore + romance + psychology are added and created by the godlike Japanese. Let me say that after 5-6 years of me turning into an adult, this is the pretty much the one that brought me close to uhh... crying, something that I never do. It made me all giddy up inside with the story driven around a high school guy with an intelligent alien as his right hand, how his perceptions about being a human and how he views humanity changes, how he becomes inhuman (mentally, NOT physically) to the point where its visible to near and dear ones. Love life aside, the protagonist often ponders about how he got this way much like we think at night about ourselves. But its the essence of the protagonist's mental/psychological change that takes the cake. He concurs that regardless whatever humans go through, certain human elements (read: compassion, envy, self-preservation,but also sacrificing oneself for the greater good etc.) can never be given up, for they are in our blood, in our DNA (though I might be overstating a bit!).
Also, the pain and suffering of losing a friend (who has a crush on you and you know it) is beautifully depicted and enhanced by the heavenly music. Oh, the music in this anime plays with your heartstrings, I kid you not. And this comes from a guy who isn't affected by romance genre. Im not going ahead and praising the action and the boss-battles (well implemented), you will have to treat yourself to it but the music really is divine, combining piano with dub-step, it gets your heart pumping. I personally award 11/10 for the BGM. Trust me when I say, the music is on par with Shingeki No Kyojin (Attack On Titan). A segment of Episode 02 will tell you that, you will know what Im talking about once you hear it. I actually watched that segment repeatedly ~20 times, just to hear the BGM.
It was this combination of awesome elements mixed together beautifully that had driven me to binge watch the entire dubbed series. My only *minor* sorrow (not disappointment) is that I probably will not get to watch a sequel of this legendary franchise, for the manga this show is based upon, ended 20 years ago.
I have already (personally) recommended this to all my friends and will do so here, because you will do yourself a big favor by witnessing this anime. Like I mentioned, for an action- maniac, I barely got into describing the tense action sequences. Treat yourself and go for it, its on par with Tokyo Ghoul (Season 1) and a great experience.
Long Live Japan, Long Live Anime!!!