My personal tierlist.

From my point of view.
D Tier is the Anime that were really bad and i didn't get them at all.
C Tier is the Anime that were okay but i can't watch them again.
B Tier is the Anime that were decent and i could watch them again sometimes.
A Tier is the Anime that i liked and i could 100% watch it again if i have time.
S Tier is the Anime that i really really liked and i could watch it anytime again.

Please don't be too mean.. it's my personal opinion and experience.

Edit: Okay i removed CSM from the tierlist because lot of people saying it's doesn't deserve D tier, so i just remove it from the whole tierlist. ^^