I had a deviated septum and I was told I snored terribly! Last year it has been corrected, and I believe I snore slightly in certain sleeping positions.
To answer your second question, a client snoring has not bothered me. I'm a very deep sleeper and haven't had any problems. Two separate clients have had cpap machines and oddly enough I found the noises to be soothing. I thought if it like a white noise machine.