On shared branches I prefer to send pull requests, that way I can rework my draft and respond to review comments until it's ready, without pushing undercooked commits directly on the shared area

What lands on the shared branch has a meaningful history, that has helped me more than once to understand the context in which an old change was made, when running git blame many months later.

I feel like it should be as easy to review the history as it is to review a PR. Squashing makes this a bit harder for me. Especially when autosquash loses long commit messages.

But I like to use git-absorb to automatically create fixup commits, it generally works pretty well and saves me a little bit of tedium each time!