Agree with all that's been said (and thanks, anuna, for the photos -- these actors' eyes are what fan fiction is based on). And yes, I see her volunteering to go after Clint very much as a "Let's see if he can be salvaged and if he can't, it should be me who ends it" moment.

There are lots of additional little notes that speak to these issues. That little scene that plays out on a monitor, with them fighting back to back (must be the Budapest she refers to, in my head canon, minus the aliens in New York, aka the reason he "remembers Budapest differently"). Or when Natasha rides the saucer ("Hawkeye? Little help here ..." "Got 'im"). That foot on the chair in the shawarma joint -- who else could/would get that close?

So much stuff to base a whole movie on ... to watch us how all this was earned. Right??