A few observations:
Overall, it was fun and suspenseful the whole season although a bit confusing at times.
Not quite as fun as S1 and 2 but still very enjoyable and the final episode was fantastic. So intense!

Hopper seems really angry throughout the season and over-acted at times.

I hope we see less of Erica next season. She was over-the-top sassy, unfunny, and annoying.

Billy should win an award for his performance. He was incredible.

Excited for S4.