Thanks for your input Merlin. It sounds like you've had a quite a bit of experience in this area, so I appreciate your advice. I hear you that no one's gonna give a crap about a PhD, I wouldn't. I'm not expecting to be a shoe-in for any residency position, no matter what I end up going for. It sounds corny but my work ethic got me in the position I'm in now, and I don't expect to be giving that up any time soon. I worked my butt off for that Step 1 score, and I'm not ashamed of it because I gave it my very best shot. So when I'm on call at 2am with my team, I will be working just as hard as the next guy/girl. It's unfortunate that some MD/PhD applicants get this air of arrogance when interviewing, and it paints us all in a bad light.
Regarding the "female" applicant thing, I honestly didn't expect that response. Every program site I checked out had only a handful of girls, so it's nice to hear that it may actually be an asset. It sucks to be on the other side of that coin though, and be passed up for a position that you are most likely more qualified for just because you didn't check the right box. I hear about that all the time in terms of med school applicants, but that's neither here nor there.
And finally, the "time line" thing. I gave up counting how many years it will take me until I'm an independent entity, whether that's as an Attending, PI, etc. The amount of time it will take me to complete the next step of my training is irrelevant to me at this point, as long as I'm happy from day to day. I'm well aware that it's gonna take me a long, long time to get to any finish line, so I just pretend the finish line doesn't exist. When the time comes, I will have to decide how important research will be to me. Who knows, I may never want to pick up another mouse again.