Is Your Niche Your Name?

"What is the best niche" is a common question for the beginner.
A lot of trainers and experts, declare that finding a specific niche is very important.
However, what if you're selected niche, becomes obsolete? What if you lose interest or passion in that niche? What if that niche turn sour, and becomes a bad topic?
Perhaps a safer bet, is to create a brand around your own identity, and then whatever your interest is, you can change and evolve.
It used to be a wise decision, to become an authority on a topic so that you can get ranked on Google. Things have changed, and this is no longer all that important. There are many other traffic sources other than google.
I have had my "MagicBrad" brand for quite a few years, but I have not built a website around it. Now might be the time.
What are your thoughts?
I have started a website with my name as the domain name. My main purpose is to share my life's stories to entertain, educate and share lessons learned.
On my Intro page, I stated this purpose, I also stated that from time to time I would write reviews on products and services I liked. These would not follow any particular niche since affiliate marketing was not my focus but a side hustle here.
The analogy I used to justify mixing personal with commercial content was the product reviews would be like commercials to earn a small income to support my efforts.
If and when my website grows traffic, I will set up Google Ads for additional revenue.
Do you think this approach makes sense? Or should I drop the reviews about products and services I liked?
Thanks for any input you can give me,
Cheers.
Edwin
I also think that once you've branded yourself as an expert on something, you shouldn't change that. It confuses your audience, both old and new.