I might also want to use this platform as a portfolio of sorts.
If security is a concern, I trust a provider like GitHub or BitBucket to secure my data better than I trust myself to secure it, esp. if I also want to be able to access that data remotely.
Then there's the ability to easily convert projects between public and private. Publicize that private side project when it's ready, or privatize the open project that you want to take commercial.
There are a ton of integrations built in to GitHub (not just GitHub Pages) that to me make it a clear win for now with BitBucket a strong 2nd in my mind.
If you're a lone dev, you can use 'tig' a command line tool to visualize git flow. Otherwise, Gitlab or one of the dozen lightweight httpd front-ends will do the job.
[1] 2009 blog post: https://www.convalesco.org/articles/2009/07/24/how-to-set-up...
Public projects are largely hosted on my own instance again, but also mirrored to github. (I like github, and I trust them, but equally I don't want to be reliant upon them so setting up mirroring before they die is better than doing so in a mad-panic as they fail!)