I was originally thinking that if I could get at least 10-12 interviews that I'd be nearly certain of landing a residency spot. However, I came across another person on this forum who is re-applying to IM after having 12 interviews last year and still not matching (he was an AMG, though had one failed step 1 that he had to repeat). Knowing that people could go on so many interviews and still not match.... well that freaks me out a bit.
I got my 6th interview today which I am VERY happy about. Originally I was planning on going with my family for 2 weeks to Asia (for a relative's wedding) in November. It would be an awesome trip and I have been really excited about it. Even though it is peak of interview season, I could still fit it around 11-12 interviews and thus get to do both (interview as well as go on the family trip). However, after hearing about people getting 12 interviews and still not matching, now I'm wondering if I should just back out of the trip and use that extra time to interview to another 5-6 places.