Seats in the 747 are comfortable.
I had to laugh a few weeks ago. The FE was getting out of his seat at the end of a trip, and went to reposition the seat electrically. I heard a snap and he let out a yell. I'm not sure what wire he found or how he found it, but he got zapped. Eight hours of peaceful rest from A to B, then shocked back to wakefulness by his own chair.