Scores are based completely on my subjective personal enjoyment, rather than an attempt at an objective rating.
I only watch anime I suspect I'll like, and I usually drop everything I don't like around the halfway point.
9-10: Personal favorite
6: Still good, though simple and/or flawed
5: Enjoyable looking past its flaws and/or lack of interesting events
4: Too flawed and/or boring to enjoy
1: The absolute worst