Which default software do you replace after you install your distro?
After I install Linux Mint (which is the distro I have settled on), I replace:
Thunderbird with Betterbird
Firefox with Librewolf (I also install Brave for web services that need a chromium browser).
Celluloid / Rythmbox with VLC player
Default Libreoffice with latest Libreoffice from source.
ClipIt/Parcellite with xfce4-clipman
I find this to be my optimal setup and these software give me the extra quality of life that make my workflows easier.
What software do you replace and install on your distro of choice?
Edit: I forgot to say I replace sudo with doas. That's something my friend told me to do although I personally don't find any immediate working advantage with it.
Celluloid is honestly better than VLC. Native Wayland, Pipewire, no filesystem permissions (Flatpak)
I am on Fedora Kinoite, I replaced Kwrite with Kate, all the other default KDE apps are great. Okular, Gwenview as Flatpak, and apart from that a mix of different KDE, GNOME or 3rd party apps as Flatpaks.
SM Player is a good one IMO; you can skin it to look good, plus it has much more features and shortcuts, also I like that it automatically grabs the subtitle file next to an MP4