Inuyasha is bleh, at first I thought it was okay, but then around episode 30 it started to drag. The story went almost nowhere, and when we did get anything good or any deep moments, it's ruined by some shallow joke of the moment. The fact that it took almost 100 episodes to get a REAL set of villians is the thing I hate most about the show. Naraku isn't a villian, he's just some crazy fool, the band of seven are crazy, and they're villians, that saga actually came out pretty well. So it's like you can skip 40 episodes and as long as you see the key 12 or 14 you haven't missed anything. I won't even touch on the ending...that was just a huge letdown.
As for Yugiou, yeah it does tend to drag at times, mainly during the battle city arc (really bad manga to anime flow) but it's a pretty good show. The Memories arc was great, had very little to do with the car game, and Takahashi's trye story telling shines in the most there. The first arc was just a weird mishmash of random games, and the anime was even worse. The second arc, DK, that was like any other genericly long arc in Shounen manga/anime. Almost no story at all there. Yugiou GX...now that show is just pure suck.