I hate that I can't use my laptop for notes in most of my STEM classes- not because the professors disallow it, but because there's simply no equation editor that I can use quickly and efficiently enough to take notes with. I tried latex, but it just requires a few too many formatting keystrokes and isn't WSYISYG enough to do on the fly (at least for me).

I'd be pretty happy with a digitizer, I think, but I wouldn't be able to stand all of the other little quirks of the surface.