I am excited about both Nexus devices this year, but given the choice, I'd go with the more powerful hardware in the 6P. I'm tired of the wonkiness of my LG G4, and I miss the Googly experience. I'm all in!!!
The Nexus 5X looks like a sexy beast!!! I want one as I'm already tired of the LG experience on my LG G4. I would give anything to come back to a Googly experience!
Being that I come from the original MotoX, I would like to see LG go more the route of Motorola. Stick with stock Android, and add the features you would like via Apps. If I'm going to skin my phone, I'll do it myself, thank you very much.