Smell, not that I remember. Sound, all the time. I’ll have conversations or hear people saying things, sometimes in different languages. Sometimes a word comes to mind that seems totally real, but usually it’s not. Some of the more detailed dreams have had storms, sirens, earthquakes (that eerie rumbling they have). Or even music.

I have some open-back headphones (wired) that I can wear for hours and forget they’re there. Not hot at all. The cushioned part is breathable too. They were a little snug at first, but great since then.