I prefer tumblr for diary style blogging, very easy to drop photo, links etc. Tumblr allows tags, so it is easy to sort out by topic, if you are generalist.
I use tumblr as my personal notes on processes related to gamedev, and itch.io devlog for summaries related to specific projects.
for example my tumblr posts related to game jam:
https://vitaliadev.tumblr.com/archive/tagged/game%20jam
And my itch.io devlog:
https://vitaliadev.itch.io/this-is-last-stand/devlog
You can also post to tumblr from your phone, so it is super convenient to write down quick ideas on the go etc. And you can make posts privately or even lock down your blog (not your main blog though).