There are some advantages, but not many in my mind. Fixed blades are typically easy to use with one hand depending on the sheath. But I don't like the idea of having to look at my belt every time I put the knife away though. But I do like the idea of having a dirt simple, reliable tool. And as long as you don't goop up the inside of the sheath cleaning is easier then with a folder as well.
I've been playing with the idea of picking up a small fixed blade knife to carry daily, but I may just used my old sharp finger. It's a heck of a knife, but the sheath needs replaced.
Other knives that I have been considering, Benchmade Bone Collector 15000-1 in walnut, BRKT knives ( of course), some of the small Buck fixed blades, and I have also been looking at a few customs for sale here.