A while ago I was looking over some of the stamps that I had in my journal and I gave a little more thought to one that I had that says, "Tire of Yaoi, We don't hate, we just wish you'd do something else". I gave it serious thought after trying to defend my own viewpoint to a few people. I don't hate yaoi myself, although some of the yaoi fans can be a tad irritating.
Such as saying that, "most yuri is pointless". To that, I say that the reason for it is becuase probably because we as male readers and writers of yuri aren't interested in relationships and just want to see the sex portion of it. That's probably the biggest reason, but my own theory is that it takes a certain kind of writer to really get into both the sex and the relationship parts of it. And from what I've seen, yaoi and shonen-ai gets the most of it.
Of course there are some shoujo-ai's out there, but then again they've been around so much that it goes without saying that yuri can be done with them. The ones I have in mind (off the top of my head) are "Sailor Moon" and "Revolutionary Girl Utena".
Though recently I had an idea and I'm not sure how well this'll go over, but perhaps someone with an idea for yuri should get together with a yaoi/shonen-ai writer and help bang out the kinks and give it a greater look and feel.
Still just ideas so let's see how it turns out.