I love playing 3-4 handed just as much as 6 handed. My raising range is proabably around 35% when 3 handed and as long as you have an edge over your opponents and are not fold fold fold and only wait for hands you should do fine. In fact, just being shorthanded over bad opponents should give you even more of an edge.

PS - I've been listening to classical music while I play and I love it. I also do not turn on my tv nor do I chat on aim... too much of a distraction. Instead I'll take a break 2-3 hours in for like 30 mins then play again.