What is your favorite page builder?

Basically, none, unless you count the Gutenberg editor. I do quite like GeneratePress for small sites but it's more framework than builder.

My personal opinion is that it's an error to build a whole second UI on top of an existing UI. Divi, Elementor, all of those - they're so horribly heavy and bloated. Better to get into code and build stuff that's slick, fast and more aligned to "true WordPress".