"DING!"

That's it for me.  I had my wife nearby the first time and even her shifting around was distracting.  I once put some nag champa insense in the burner right before launch and it ruined the entire journey.... the fewer distractions the better for me at least.  I need all of my attention in what is going on during the trip.

That being said, I also really enjoy talking with someone about 15 minutes after re-entry.  Having someone to talk about what happened with really does help integrate it.  Unfortunatly there are only a very few people who have journey themselves and talking with someone who has not usually gets a funny look.