I tend to only watch anime over Manga when A. The series of interest has no manga basis like Gurren Lagann and B. It's a complete anime that covered the whole manga and with little to no censorship, like Monster or Yu Yu Hakusho (although the ending was altered). I feel you Dream. It's like you're forcing yourself to watch titles. I have done this too, but I'm a lot less patient now. I usually give something 5 - 10 episodes before dropping it now. That's only fair for short titles as that could encompass a good amount of the show to begin with. I might give longer titles a bit more time, but I try not to fall into forcing myself to watch something just because I started it.