I snore! But I'm very well trained, and usually turn over and stop if told to or poked.

But yes, I always don the earplugs and noise-cancelling headphones to block out the snores, clanks, and chatter anyway on night flights.

Now don't get me started on the people who start snoring like chainsaws whilst sat bolt upright on a shorthaul flight in the middle of the day (when neither earplugs nor headsets are available). I have before now tried flicking water across the aisle at them, with, I am proud to report, zero success!