I didn't get my driver's license until I was almost 30. It was a combination of a bunch of little issues: my parents seldom had cars growing up, I didn't get my learner's permit until age 21 (and only then so I could buy a beer if I wanted to, though I didn't drink at the time and still only drink minimal alcohol), and for some odd reason—I think it was related to my mental issues—I simply could not pass that road test. Three failed tests, two of whom humiliated me so badly that it made me literally cry, I was so bad. Eventually the fourth time, I barely passed. The instructor turned out to be the guy who had flunked me the second time, but he was more understanding than the other two.
I'm still not a great driver, though my record is clean.