I always have an aisle seat.
Partly for the disembarkation reason, partly for the ability to stick my leg into the aisle so I can slump in my seat and partly because I have a weak bladder so always need to piss at some point (I can usually time it so that I go just before the seatbelt light goes on for landing).
I also leave my seatbelt on until the light goes off -- simply because I know my bags will take forever to come off anyhow, if they ever turn up, so there's no point rushing to the baggage collect.
I've been on a couple of dozen or so flights in the past couple of years and only been on one plane with a fault (air-con and pressurisation problem) -- which I realised before the announcement was made because my ears popped so I checked the air pressure on my watch and found it to be unusually low.
(Me, I'm not... in any way intoxicated, Wed 21 Dec 2011, 15:23, Reply)