How do you power your personal site/blog? What should I use?

I currently have a personal "portfolio" site that I haven't updated in close to a year. I'm planning now on revamping it, and I am using this opportunity to reconsider the static site generator I am using.

I host my site on Github pages, which means that Jekyll was originally very appealing due to its nice integration with Github. However, I have found it difficult to greatly customize the themes I find, and I'm the type of person that likes to get everything "just right". It seems like Hugo might be more extensible in this regard, but I'm not sure if that alone makes it worth the switch from my current setup. Anecdotally, a lot of the blogs I find whose layouts I really like tend to use Hugo.

Pure HTML/CSS is an option but that seems like a big overhead for what I want. I'm no web developer and I don't plan on becoming one.