Season one blew my mind away, but season two was more of the same and season three was basically disappointing. So, the series started at a 9/10, but then became a 7/10 and finally ended with a 5/10. Somehow the actors lost their spark - maybe the fame got into their heads. Sorry, but season three just didn't do it for me. The Silent Hill effects were completely gone in season three and that somehow interrupted the flow of the series. Still a good effort though. Having said all of this - highly recommend watching the series 'Dark'. It makes you rethink your rating for 'Stranger Things'. 'Dark' is what 'Stranger Things" should have been 100% of the time.

Added season 4 feedback:

Well, just increased my rating of this show again. Was very high in season one, was okay in season two, a somewhat disappointing season three, but back with a vengeance in season four it seems. The first episode of season four was confusing, but slowly but surely it was picking up the storyline and building up the tension, and would happily score the last two episodes of season four a 9/10. Everything seems to fall in place, the character development, the special effects, the sceneries, the cinematography overall, the music selection, the acting, the 80s feeling, just can't fault it, so well done, a great comeback after a weaker season three. Clearly this is one of the foundation pillars that's keeping Netflix's audience bound to Netflix, just as the Game of Throne instalments are keeping HBO's audience bound to HBO, and Marvel is keeping its audience bound to Disney. Clever and lucky for all three of them. It seems the war of streamers is still full on and likely to continue for a while, guess now it all depends on how loyal and greedy certain directors and producers will prove being.