Spoiler-free answer.
My favourite quest was the treasure hunt you do with the space pirate (whichever side you pick), in particular the last mission "eye of the storm".
My second favourite is "entangled", but it's more because of the "wow" factor at the start. The rest of the quest was standard.
Most of the other quests are forgettable and badly written.
The worst quest for me is "operation starseed", which feels like a bad Star Trek episode.
If you come from Debian, you can also consider Linux Mint Debian Edition - LMDE, which should be even easier for you.
Currently it's LMDE 6 but a new release is around the corner, with the imminent release of Debian Trixie.