I agree with many others here, put her on a banner! This thread is one of the largest threads I've seen on polycount. It's filled with lot and lots of handpainted texture advice, and it shows Jessica's progression from tiling texture noob to stunning handpainted texture artist, the final pieces is one of the nicest looking…
I think handpainted has much less of a place in PBR. I'd go so far as to say conventional 'handpainted' is pretty much the antithesis of what PBR is trying to achieve. But if a developer wanted to drop PBR/next-gen lighting/post-processing, and just go with handpainted, I'm sure nothing is stopping them.
Handpainting: how to make really simple stuff in really complicated way I suggest learning the principles of light and shadow simply first, then trying to make 'handpainted game textures'