I try to find ways
First off, Hello everyone! This is my first post even though I read macrumors pretty much everyday. I joined in mainly to chime in on this subject, but hopefully I have something substantive to add to this and other discussions in the future. I've spent the better part of the last 4 years switching between android phones and iphones (mainly because i keep breaking them) so trying to settle in on something that stored info like this hasn't really been a viable options/concern.
Since I've gotten the 5S I find myself finding ways to use passbook. I use it at stores, for airline tickets/reward membership info, discounts etc.
I would say the place I mainly use passbook is at Walgreen strangely enough, and that's because 1. There's one right down the street from my house and 2. Any time I get close to it, the option to pull up my card in passbook automatically comes up.
Outside of the lack of integration with myriads of other apps (even ones in the same industry or with similar programs), I find myself hoping that different places I go or events I attend have the option of using passbook for something.