I value extra legroom over seat width. Couple times on 757 (non-PS) I had one of the bulkhead/exit row seats and they upgraded me to F. Once I tried calling to get my seat back, and it was such a headache I never did that again.

Another time, I had printed my BP at T-24 and boarded the plane. The GA come aboard, and say "Mr. Level, I have an upgrade for you", and I told him I didn't want it. When the door closed, I had 8 A, B and C all by myself, which IMO, is superior to a seat in F!