Do medical schools have a preference? Or does it not matter and "the stronger the letter the better"? Also, what is your experience with asking professors you haven't seen in awhile for LORs? I just sent out a bunch of form emails requesting LORs to professors I've taken over the past year. I didn't know them well, per say, but I wasn't some invisible entity in their class. They gave me A's, I asked a few questions in class, went to a few office hours, and when class finished, I left. Anyway, the emails basically attempt to remind them of who I am and ask if they can write a "good" letter for me.