Tbh I liked Plex when I used it years ago, then I stopped using it as I went full on Netflix/Amazon Prime out of sheer laziness. Having now come back to self-hosting and acquiring media myself, I went with Jellyfin mostly because it's FOSS and it does everything I need it to. I noticed Plex has some features locked behind a subscription which I don't like the idea of, and iirc there were some privacy issues at some point? So those things made me hesitant to give Plex another go.

Also, I had used a friend's Jellyfin before hosting it myself and I was really impressed with how well it worked on my devices, whereas when I used to use Plex I'd see stuttering/buffering issues from time to time, especially if watching a foreign film for example and the subtitles wouldn't load/render from the .srt file properly.

As for apps... my TV runs Android and the Jellyfin app on that works great, and no problems with the iPad app either. I can't speak for consoles though as I don't use mine any more so have no idea what the JF app is like on those.

• Jellyfin - film/tv, both locally and on a seedbox.
• stable-diffusion-webui - self explanatory
• Matrix/synapse - private instant messaging for myself and tech minded friends
• MeTube - web UI for youtube-dl
• Stash - like Jellyfin/Plex but for any adult media you may have (link is SFW).
• Lemmy - only privately just seeing how it all works, I don't intend to make a public instance.
• A fairly typical LEMP (Ubuntu, Nginx, MariaDB, PHP) stack on my VPS

Stuff I used to use or have at least tried out:

• Plex
• Calibre-web
• Typical LAMP (CentOS, Apache, MySQL, PHP) stack back in the old days (PHP4/5) when I did a bit of web dev.