Mod Edit: This review may contain spoilers.
I debated writing a review for Inuyasha since I believe for the most part the majority of people already know what they think of it but after forcing myself to re-watch the series I felt compelled to write this.
Story:
The story is designed to never end and gives you roughly 4 filler episodes in-between anything that actually progresses the story. Is it a spoiler to tell you that at the end of 167 episodes they still have to complete the jewel and defeat the villain? Well I wish someone would have spoiled it for me. However despite saying that the anime clearly isn't trying in any way to have an interesting or meaningful story so some of you maybe able to over look that. This is a anime that is trying to relie on fights and characters to be entertaining.
Art:
Honest opinion? I've seen better and I won't be watching anything worst I hope. Mediocrity's definition really. Normally art is one of the last things I base a anime on. Sure it's important but to me so long as everything looks okay I don't care. However in the case of Inuyasha the fighting animations were really disappointing. If you don't wanna have a story that is fine, but in this case with nothing else going for it I feel like going beyond normal really would have made a huge difference in term of enjoyability.
Sound:
Meh.
Characters:
They are all so shallow. One personality trait was handed to each of them and trust me they only get one. If you don't think mary-sue after meeting kagome read a fan-fiction with an oc. Actually never mind, it would probably be better.
Enjoyment:
Inuyasha may have been more enjoyable if it hadn't of been so long. Also since I didn't find it funny (I don't like slapstick humor) that to could contribute to it's lack of enjoyability.
Overall:
It get's a 5. Inuyasha easily could have gotten a seven if it had done one of two things, either developed nicer fights or developed it's characters at all. It's a long anime with nothing going for it. If you like pointless filler episodes there are animes that cater to that much better, If you like action then there are animes that also cater to that much better.
At the end of the day it's hard to find something outstanding or great about Inuyasha. It is an anime I can not recommend to anyone.