My ratings: (★ - full point, ✪ - half point)
★★★★★ - I either really loved the anime as a whole or a certain aspect of it was so great that it overshadowed all of its deficiencies. I would recommend it to anyone. Must see. Well above average.
★★★★✪ - I liked the anime as a whole or I really liked a certain aspect of it. Great anime. Above average.
★★★★☆ - Average. Not a masterpiece, but not that bad either.
★★★✪☆ - Not a bad anime, but something was missing. Somewhat below average, but still somewhat worth to watch.
★★★☆☆ and ★★✪☆☆ - Bad anime. Don't watch unless you don't have anything else to do.
★★☆☆☆ and ★✪☆☆☆ - A really bad anime. Do. Not. Watch.
★☆☆☆☆ and ✪☆☆☆☆ - A complete failure. Don't watch unless you feel suicidal.