I myself do like Inuyasha verry much but I really do see your point. It's not my favorite anime because, ( I agree with you here) It is verry verry long. It's seems like they didn't need all the fights with Naraku and just all the totally random demons. It was interesting to see your point though, by the way if you like anime/manga with a deep plot I highly highly recamend Tubasa Chronicle and xxxHolic by CLAMP. More the manga than the anime mind you ^_~