i watch anime if i find it entertaining. i often don't watch anime even i think is good if it doesn't keep me laughing enough or amused enough. couldn't care less if it's popular.
If something catches my eye, I look it up, read a little about the plot, look at a review or two, look at the art, etc. If I find it appealing, I'll give it a try! So... I watch because I think it's good.
I watch an Anime when it seems interesting for me. But often I start watching an Anime that is popular or people say it's good, but when I don't like it I search an other on my own.
I first read the plot summary that websites provide,if the story is good i start watching the anime, but if the anime dosent prove to be good,i will stop watching it even if its very popular .