Traveling is fun, but there is a downside if you travel by air. Airports are RARELY fun and the process of getting through security can be a lengthy one with a lot of hoops to jump through.
Not only do you usually need to take your baggie of 3 oz. liquids out of your luggage, take your shoes off and take some of your electronics out of your bags, you also need to dig out your ID and boarding pass to show to a TSA agent even BEFORE you do all that. Of course, there are ways to skip some of that process, like TSA Precheck. However, some technology introduced last year could speed up the process even more.