huge numbers of episodes are not a huge turnoff for me since I watch Yugioh, Digimon, Naruto and Pokemon. The thing I do hate are fillers. If the fillers goes for 5-10 episodes, then I'll lose interest during that period of time and wait a few weeks until they release the full arc so I won't have to watch every week just for a useless filler. Since every episodes generally run for 22 minutes with no commercial, 5 or 10 episodes could go up to 220 minutes, which is 3 hours and 40 minutes of my time just watching fillers that won't contribute to the story. Might as well just sit down on a chair and look at my plants grow, in the end it'll be the same thing, nothing interesting will happen in both cases.