Bought my first bike in 1985 when I was 22. It was a 1976 Yamaha XT500. Had it about three weeks, got drunk and wrecked it.
I didn't ride again until 1996, then 33 years old, married, two kids. Bought a 1978 Yamaha XS650. Rode that for a couple of years, then purchased a 1986 Honda XL600R(still have that one). Sold the XS650 to finance a restoration of a 1976 Honda 750 Supersport. That went badly. Rode it less than a year. Then, in Sept, 2000, I bought a 2000 Bandit 1200, used, three months old, with 1500 miles. Now has 42k, also still have the XL600. Came home with the Bandit and gave the CB750 to a neighbor.
Starting later probably saved my ass(refer to XT500 incident mentioned above). Marriage and fatherhood calmed me down.