Abs
My personal take on ABS is that I've had it and I haven't had it. As long as you are proficient at modulating the brakes, 99% of the time you don't need it. In a class 8 vehicle I can stop as quickly on a wet skid pad without ABS as I can with an ABS equipped vehicle but it takes practice to attain the fine edge where the tires are on the threshold of breaking traction and a pronounced skid. One nice feature of ABS is that it controls induced skids and on a bike that can keep you from the hospital. It's also nice on a truck where a jackknife can happen quickly, but, being able do drive out of a jackknife is also a plus.
Have I ever desired it on a bike, no. Would I get it if it was available, I'm not sure. It's mandatory on Class 8 vehicles now. I prefer to have a choice.