@marek Ah, if it's personal then I can answer! The main reasons why I use Friendica are the following:

• Threaded conversations à-la-Facebook.
• RSS support.
• Diaspora support (I mainly like the concept, I don't have many remaining Diaspora contacts).
• Twitter support (although my patience for the platform is rapidly dwindling).
• It's written in PHP so I can contribute!

I've looked in Hubzilla as well but I found it too unintuitive and I don't care much about nomad identity anyway.

I also run a single-user Pixelfed instance that I though would be a good complement for images, but I found out that I use it the same way I used Instagram before Facebook bought it out, which excludes casual image posts.

Still, I'm not a big image guy, I'm even less of a video guy, so I've never felt compelled to look into media support in Friendica myself. I've even resorted to post pictures on my Twitter account which would be mirrored on Friendica.