Font rendering is a very subjective topic, and one that people like to
complain endlessly about. There's certainly no single 'correct'
rendering, but instead a continuum depending on whether you put more
emphasis on sharpness or shape or uniformity. And which style of
rendering you prefer depends on your vision, personal preference and
prior experience with rendering on other systems.
I myself am perfectly fine with the way fonts appear out of the box on
Fedora. Maybe I am just not very picky when it comes to fonts.
Matthias