Its all or nothing for me. I have a Sharpmaker and it works great on partially serrated blades. I end up trading or selling almost every serrated blade I've ever had. If a blade is to have serrations, I prefer it be fully serrated.
One thing I've notices about serrations that no one has mentioned. Every partially serrated knife I've been asked to sharpen by friends has damage on the serrations. Chips, dents, broken tips. I dont know what they are doing, but they are all doing whatever it is.
Another aspect of serrated blades is the thinner edge angle. Notice that on most knives (the exception being CRKT) that the plaing edge is beveled on both sides while the serrations are beveled on only one. This leads to an edge angle of about half the plain edge portion, or maybe less. My old CRKT M16-03 was partially serrated, and the serrations matched the 20 degree Sharpmaker slot on one side, but had no secondary bevel on the back, meaning a 20 degree inclusive edge angle; much thinner than most people consider practical for a tactical folder. This is part of the reason for the increased cutting ability, and part of the reason for the paragraph above. I also think serrated knives and partially serrated knives get used to cut stuff they shouldnt more, leading to frequent damage of the serrations.
