Check out the case by oblique on amazon. It has the same textured backing that the phone does. Keeps the phone low profile too. I like it a lot
http://www.amazon.com/Absorption-Protection-Bumper-Scratch-Protective/dp/B016WSNTC4
Dude, I just got the oblique. I love this thing. The extra grip on the edges is amazing.. I'm usually a no case guy. But this one is perfect!
Edit: [this one](LG V10 Case, OBLIQ [Shock Absorption][Flex Pro] [Black] Thin Slim Fit [Drop Protection] Bumper Soft TPU Scratch Resist Protective Case (for LG V10) https://www.amazon.com/dp/B016WSNTC4/ref=cm_sw_r_sms_awd_8buPwbMKBH1Y2)
What about this one anyone tried it? Looks like a bumper so you keep the cool look of the back and the slimness of the phone..
I've had no issue with the V10 being "slippery" in my small child hands (I'm not a child, just have small hands), that said, this is the case I bought,
http://www.amazon.com/gp/product/B016WSNTC4
which is pretty grippy, but I found I really don't need it day to day so normally I don't use it.
This is the Obliq:
It is thinner and probably provides a bit less protection but it has way better grip and feels much better in your hand.