Almost from the beginning (last year for me), I've pretty much used Morris's Miss April texture.
http://market.renderosity.com/softgood.ez?ViewSoftgood=25602
However, I do have Mirrin's Valkyri and Dark Omega's Exterminatrix textures which I like for their faces. I've tweeked April a bit over time, in particular by using a bump mat attached to the displacement node, and by doing a few of my own make-ups via PSP5. Also, I have RDNA's shaders so I can alter her skintones when I want a change. The other thing that recommended April to me is that she's hairless, something I prefer. Many other textures out there have a pubic patch of some size. I must say, however, that I have been looking at Gwendolyn's textures and characters with a great deal of interest, and will probably try out one of them in the near future.