Comment by Delphiki

Yepp, I generally will try for the exit row or the first row in a section (sacrificing no under seat storage), but they tend to be the first seats booked. Since I'm usually traveling with multiple other people and we prefer sitting together, it makes it pretty difficult to reliably select those seats with extra leg room. I haven't seen any airlines that charge "+$25 for the extra leg room" on 12+ hour international flights, but if they exist I'd love to know which ones they are!