My first student was the day after I passed my CFI ride.... luckily he is now my prodigy student and the lesson went very well. He had no idea that it was my first lesson with a student. This kid is sharp and I can't seem to trip him up on anything. He was just prior to solo when I picked him up and I soloed him shortly there after.
I think everyone has a student opposite of that, though as well... everything they do makes you incredibly irritated and they're very impatient with their training. One of those that you want the power-on stall to sort of "go awry" one time just to teach them themselves they don't know everything...