I have a sterling silver ballpoint for scrawling notes.
I also have a Parker Premier for study:
Warning: Spoiler! (Click to show)
It's a no fuss fountain pen that writes beautifully. I have found that since starting with it, I tend to care more about how I write and also I remember what I write exceedingly better (which is important as I use it to write study notes). I would recommend to anyone studying that they use a good, heavy pen.