I usually travel in F but got a pretty reasonable deal the other week in J on A380 so decided to check it out. My friend suggested I book the 2 seats in the middle seated together. In my opinion unless you are glued to your partner bad choice. everyone including the FA jump into the little space next to the seat constantly and also when turning during sleep it does disturb the other person. I would never take these seats again If travelling with someone I would either take a window and opposite( well staggered but opposite) isle or each middle isle seat and just join each other at the bar oif needing to talk.