I agree that popularity doesn't make something bad, but I think you're missing some of my point. Go look at the Billboard 100, and tell me that any of those songs are good. Maybe 5, 10 at the most are worth listening to once. These lists are made by the mainstream, and the mainstream opinion, as a collective, is usually garbage. Conceding that anime has more of a niche audience than Billboard, I could see a little more favor toward your opinion there. The truth is, most people are just content with the status-quo. If people have something pounded into their heads enough, they start to enjoy it.
Speaking for the record, and in generalizations, I really don't like anime. I mean, there are a few that are ok, but in all I don't understand it. To me, its like nothing original has come out of it in years. Generally, it all looks like the same people made it. It would be like South Park caught on, and suddenly every American cartoon was done with cut-out construction paper. The other reason that I dislike it is because it somehow got this "cartoons for adults" label, that is just bullshit. People have tried to tell me to watch stuff because, "the stories actually go deeper into the human condition," and then there's a scene with some guy farting all over the place and stuff.
I love comedy, and hell, you all know how I feel about dick and fart jokes. But don't try to tell me that this is supposed to be "deep" or anything. And yes, I understand that the culture is different, but that really adds nothing to the argument. I am of the same culture as a lot of people who watch anime, and I still don't get it. And honestly, I'm sure some of it is the fans. I'm sure, as with music, I could be into a lot more stuff if the fans weren't such damn wankers.
If you're still along with me on this blathering post, I guess what I'm trying to say is that not all anime is bad. Not all popular things are bad. But most of them are.