On last Monday's flight 592 LAS to YYZ I was in seat 2C in an Airbus 319. I booked that J class seat back in March since it has extra legroom (I'm 6'2"). The last minute passenger in 1C asked if I would change to another aisle seat so he could sit with his wife. I felt badly about refusing his request, but he was understanding when I explained how much I wanted the 2C seat. As it turned out the passenger next to his wife agreed to swap seats, so all was well.