I hesitated to do it, but I categorized my links. There are those that I read daily, some that I check occasionally, and others that, for lack of a better phrase, I'm just trying on for size. Maybe I'll like them; maybe I won't. I still think it's fascinating to see who chooses to link to what. And just because I like your blog doesn't necessarily mean I like the blogs you like. But there are no rules and just because someone links to you doesn't mean that you are required to link to them.
It's my blog and I'll link to yours if I want to...or if you pay me to do it. Belle de Jour isn't the only one who can be yours for a price.