YSK - you shouldn't avoid getting your pictures taken
For context, if you are shy or uncomfortable having your pictures taken, please reconsider! My uncle passed away due to cancer a few years ago and we realized that he didn't like his pictures taken.... So now all we have to remember him by are a handful of pictures.
We're in the exact same boat. My uncle passed a few years back. My wedding was a couple years earlier, and I forced him to be in a family portrait less than a year before he died. I'm grateful we have these.