I currently have a bulkhead center seat on a long trip from Chicago to Frankfurt. Should I try and change to a window seat (or maybe aisle seat?) Which do you prefer? I love the idea of extra leg-room, but I don't want to end up slumped over on a stranger's shoulder if I (hopefully) fall asleep. I may not even have the opportunity to switch, but just in case. What's your opinion?
Thanks,
Laurie

I prefer an aisle seat myself....there is nothing to see out the window except perhaps during the last few minutes before landing and even then that's problematic.

With an aisle seat, it is easy to get up and stretch and/or to use the facilities without having to climb over somebody else (of course the downside of this is that if your seatmates wish to do the same, they have to climb over you) but I prefer the former to the later...

My peference is for a window seat, so I can lean against the wall to sleep.

I love the window for the same reason that Abram does: sleep! I will do anything to trade up to it, and as your fear is that you will end up on someone's shoulder, I suggest you do the same.

I like the aisle as I can stretch out more--window is second choice, but I've sometimes ended up with a huge person in the seat next to me resulting in being pinned against the side of the aircraft. Bummer.

Mrs. Fly prefers window. On a very long flight (like to Asia) we'll switch seats now and then.