Why so SERIOUS. Sorry couldn't help it.
I'll tell ya, the "soft touch" plastic backs Moto offers are not slippery, at least not to me, and I felt a leather backed phone as well and it was simply AWESOME in hand. It's all about what you put on there ya know? My original X had the black "textured" back - there was no texture just had a textured look - it was the soft touch plastic - it was not in the slightest bit slippery. Now when I checked colors prior to making it on Motomaker, there were some colors that were slicker than others, but not glassy slick. With the Nexus 6 (midnight blue) I think it has a brilliant texture I would liken to my first gen X.