Review System

Book, Manga, Comics Review
I use the Goodreads 5-star rating.  I use this rating for my comic, manga and book reviews. ★★★★★ - It was amazing
★★★★☆ - Really liked it
★★★☆☆ - Like it 
★★☆☆☆ - It was okay     
★☆☆☆☆ - Did not like it 

Movie, TV show Review
For movies and tv shows, I use 2 review ratings. One is from IMDb, and the other is from Letterboxd.
IMDb -  ★★★★★★★★★★
Letterboxd - 5.0 / 4.5 / 4.0 / 3.5 / 3.0 / 2.5 / 2.0 / 1.5 / 1.0