I’m careful, considerate and respectful of my things and even more so of other people’s things. I would not have even touched your car’s side with my door unless it had been completely unavoidable, and even then you would not have known unless you were inside the car or watching – and I’d still look to be sure things were okay.
On the other hand, it’s small stuff. I’ve seen it happen to my car – and even though it’s now 12 years old and has over 100,000 miles (and I bought it when it was 2 years old and already had over 20,000 miles and a few dings) – I didn’t even care that much when it was shinier and newer. Had that happened to me as you describe, I would have made a note of her, to be sure that I avoid her in the future when I can and park away from her if it’s at work or someplace where I might see her again (but the people I work with aren’t generally like that, either, so that’s kind of a moot point). And I also park at the far end of most parking lots to avail the space that’s generally open there (and to add more to my walking needs, because I do need the walk, after all).
I’ve also developed a specific routine for when I have to park next to someone. I try to make sure that I can park driver’s side to driver’s side and maximize that space between vehicles. So if the other guy is parked nose-to-curb, then I’ll back into my spot so our cars have my left side by side with his left, and I crowd the line on the other side of my car. (That means that there’s almost no space between my passenger side and the edge of the parking slot, but if the next guy pulls in nose-first into that spot, then we’re parked offside-to-offside, and those doors don’t need to be opened so much.) When the driver has max room to open his door (as I do), then there’s not much opportunity for a problem.