When I first started, I used Hexo.
Then, I moved to Hugo.
Ultimately though, I decided to roll my own.
Currently my site's content and the generator live in the same repo.
While not up to date, my colophon contains details of how my site is built. The README in the repo also contains more up to date information since the massive revamp I made last month (which I still need to write about). I think that revamp and decoupling of various components in my site would've been significantly harder had I not been in complete control of my codebase.
Although I have to pay a maintenance toll by owning the code that generates my site, knowing the entire codebase also gives me freedom to experiment and explore.