Currently my must haves are:
* Router - pfSense - https://www.pfsense.org/
* Movies/TV/Home Videos - Plex
* Minecraft Server - AMP - https://cubecoders.com/AMPInstall
* Music - Roon - https://roonlabs.com/
* Automation - HomeAssistant - https://www.home-assistant.io/
* Unifi Controller
* Email - Zimbra - https://www.zimbra.com/downloads/
* Files - Synology
My experience:
* I can't recommend AMP enough for gamers
* Roon is £££ but if you like music it's such a unique piece of software
* Zimbra isn't what it used to be alas and I've been moving this to Microsoft 365
* HomeAssistant is fantastic and allows me to use pretty much any IoT device whether it has HomeBridge capability or not
* Synology - again expensive but after years of using Debian with my own custom setup, then OMV, then Unraid (briefly) then FreeNAS - Synology's DSM offers a level of capability and zero touch that none of the home rolled solutions match
* Plex - I really hope they never mess with this product, I find it super good although I need to check out Jellyfin
* pfSense - again, a top quality product - I'd love to use Unifi's offering but nothing I've seen (apart from OPNSense) competes feature wise