Pick your poison and stick with it....+1
I haven't been stringing for that long, but I have noticed that different strings react differently.
example: nrg2 ...I tie my knot and get very little or no drawback when releasing the clamp
With ogsm, the string seems to be stretchier/mushier, and I get a tad of drawback when releasing the clamp.
I also started by using pliers to cinch knots, but have since gone to only using my hands.
2x APDGT, Ektelon H, SP Lite on steroids