Row 6 always and forever.

1) Off the plane in a hurry.

2) I don't like having the gap under the arm rest for people to spill into my personal space. The solid arm rest in 6 is great.

3) Window seats in Row 17 have historically had a harder seat cushion (is that still accurate? I haven't ridden there in a long time). Anything over an hour or two gets awfully uncomfortable.