Handwritten dfeinately.
I do like them to look nice, which might be a waste of time, but since I learn them mostly as I'm writing them out that isn't too much of a problem. I will read over them again afterwards, and then the fact that they are nice to look at it, means its not too horrific to be reading them :P And its easier for me to remember if I've got them laid out nicely, because I know where the information was on the page, and what colour it was in and that helps. Just looking at a page of writing knowing I need to learn it is horrible, but if I have a bright green box somewhere, I know thats important and I'll remember it.
It depends whether you learn by actually writing the notes and working it out or whether reading/saying them afterwards is how you learn. Definately write them if you are a 'doing' learner, but if you are visual/auditary, maybe better to type them because you'll get the actual note making done quicker, depending on your subject.