2F on CRJs.
You get even more space than on an exit row (indeed quite important when you're 185cm),
you get a window,
you can get up without having your neighbour get up before,
and when the F/A comes back to pick up the meal tray, you can usually have one more (they don't reach the back of the plane
so... 4 good reason to ask at check'in "Is 2F still available ?" (though I don't do that when I travel with my boss..."