It'll probably continue to change with age and experience.
While I've certainly felt an affinity for different types of handguns over the course of my life, I've long since decided there isn't ONE particular make/model/caliber that suits all my needs, let alone all of my personal preferences.
I can't imagine having a particular handgun represent "me". Not in my eyes, and certainly not in the eyes of someone else.
I've often listened to other firearms instructors over the years comment upon how they were surprised I'd be using/carrying some different make/model/caliber of handgun than they expected. It's generally seemed most of them thought I'd always be using one or another with which they'd seen me do particularly well ... and it just happened to be one with which
they had a personal affinity, or a distinct preference for, themselves.
Task at hand, anticipated circumstances, physical use limitations, carry method choice and/or requirement, recent experience, emphasis on training & experience ... even a passing mood. Choose whatever reason or justification suits you.
It's just a handgun.
Of course, if you're a person who has a favorite type of footwear which which you identify, sunglasses, timepiece, hat, etc ... why not a firearm?
Suit yourself.