Why is Doctor Who unpopular?

Is it? It seems to me it's quite popular. I know I LOVE the show.

However, I see what you mean. It's not quite as well known as Stargate or other Science Fiction series in the US. I suppose this is because it is from the UK. Still, though, I wouldn't say it's obscure, or even close to being so, even in the US.

I mean, come on! It even has its own category here!