Step 2 doesn't matter much in the process because most people take it late in the season. As for the rest, PD's just looking for good people to work with and grades not mattering as much, that is a load of crap. Your clinical grades and step1 scores are the main factors they consider. Before your interview you are largely already ranked based upon those two. If you seem like an a$$ when they interview you you will fall on the list, but there isn't much you can do to advance on the list. That makes sense if you think about it, granted there are some people in your med school classes you don't want to work with, but for the most part they are OK. If you have a low step one, your best bet is to take the step 2 early, so they can consider it while they grant interviews, or to apply to alot of places, so you get as many interviews as possible.