If I understand you correctly you're asking us what is weak about our applications?
For me, my GPA is far from great. I had some financial problems soph/jun year and it affected my school performance. Overall it sucks. But too little, too late. This is the main problem with my app
My MCAT is eh - a few more points would have been nice. I should have kicked my butt better that summer, but what can you do.
My ECs are excellent, especially since they center around what I am passionate about (Community service with underserved populations, both medically and otherwise). This works well for me, because apparently when people bring it up (so when they ask in interviews) I "glow" (haha career center people) with enthusiasm about it so you can tell I'm passionate about it and I didn't JUST do it to have an EC. This also relates to experiences, doing this has made me very confident in my reasons to become a doctor giving me a REALLY clear and concise answer to "Why an MD?"
Lack of research. This along with the mediocre GPA is what is keeping me out of Cali schools. Its unfortunate because I would love to stay in Cali. But I just don't like research. I actually think I would really enjoy clinical research - but without going across the bridge to UCSF all the time that wasn't an option. Plus I had to work to pay the bills so I just didn't have the time. This is a major flaw for me as far as "upper" schools go. They want researchers, and if you haven't done any its a HUGE red flag.
I'm confident - which when I get into medical school is actually going to end up being a weakness because I have a big head about med school "not looking that hard" (I know it is but I just can't convince myself that taking two classes at a time could possibly be has hard as 19 units with a 30 hr a week job). But the confidence boosts my interview performance for now. It makes me very vibrant and friendly without being cocky which has helped make my interviews fun and conversational. Also makes me look like a good candidate. (as I mention before I think this is because I'm a little older than the typical applicant - even if only by a year - I feel a LOT more mature than I did a year ago).
As far as other experiences that make me a strong applicant go, I grew up pretty poor, which I think is helpful in explaining a lot of my views. It helps to exist on one extreme or the other because it can explain a lot about you since its outside of the norm.
I guess the last experience would be that taking a year off and working 8-5 has really put school in perspective. AND I CANNOT WAIT TO GO BACK. I think that kind of shines through in interviews which is useful.
So yeah, GPA and research are my major problems. Other than that I don't really have many weaknesses in my app - which was on purpose on my part. I knew I was applying once and that was it. If I got rejected, well then I wasn't going to be a doctor. Because of this attitude I waited until after I graduated and took a year off because I knew it would make my app stronger (increased my GPA .2 and more extra curriculars). It also made me older, which is part of what gives me the laidback confidence I have in interviews.
Also, I am just working and my boss knew I was applying before he hired me - so taking time off for interviews is a breeze. I took a whole week off to enjoy DC when I went to GWU. Working instead of being in school makes the whole process so much more fun.
Waiting also let me take my MCAT my summer before senior year which was a great time for me to take it. Nothing else to do and lots of time to devote to the test. If I had had to do it during school both my grades and my MCAT score would have suffered.
So yeah, I honestly think everyone should just wait until their application is at its strongest - it really makes the whole process more enjoyable. But I realize some people are really against years off and this mentality doesn't work for them.
EDIT: Good grief - I wrote a book. I sure hope I answered the question you were asking.
