All of my pliers have been Snap On for a very long time. Then I ordered a pair of NWS pliers just to see what all the hubub was about. Now I'm trying to replace all of my Snap On pliers and cutters with NWS. It's a tough pill to swallow. NWS pliers absolutely blew me away, I honestly didn't know how nice a set of pliers/cutters could feel. Ash is great too, definitely kudos to him for making NWS tools available easily and reasonably priced.
I would say my second favorite pliers is Knipex and then Snap On & Channellock are tied for third.
This is just out of the brands I've tried. Certainly I've missed trying some worthy candidates.