Taking over 10,000 pictures? How do you find any time to ever look at them again? Perhaps a better question to ask is how many really good pictures have you taken that you would actually want to look at again or show others?
Well, out of my nearly 10,000, I deleted over 1000. 1200 or so were for one wedding that I did. I want to see about 20-30 of those again (to use as samples). Many times I have an idea for a picture and I take a series to try to get what I want. A seven month old isn't necessarily the most cooperative model in the world. So out of 10-30 pictures, I'm really trying to get one or a couple good ones. Sometimes I take pictures solely to experiment with a setting or technique. After examining the pictures to see what worked and what didn't, I don't particularly want to look at those again.
And as for how many pictures I'd want to show others? I don't think many people want to sit through slide shows they're not interested in. My relatives and some coworkers and friends like seeing pictures of my daughter, but yeah, people who don't know me and her might be interested in maybe 10 of those 4000 or so pictures, at most, only more if they are interested personally photographing babies or are otherwise baby obsessed. While I don't particularly want to look at someone's wedding whom I don't know, the couple and their family are interested in those pictures (not all of them to be sure, but hundreds.) Likewise, other people who photograph weddings or are wedding obsessed might be interested in those pics, but the average bear would find them almost completely uninteresting.