What are you waiting for? We aren't going to get any younger! There is no time like the present to capture a beautiful portrait of yourself.
Portraits have moved on. They are far removed from the sanitised 'grin and click' experience you probably had at school. A modern portrait tries to capture and convey a sense of the person.
Perhaps you play the guitar, take part in a sport or dance? It doesn't have to be extreme, walking or reading could be your thing. Whatever it is you do, that makes you, well you! I can build a session around your interests to portray an image of who you are. That's far more interesting than the 'lets all jump in the air against a White background' approach, isn't it?