Besides the high end gacha games and a handful of PS3 era ports, it's all about emulation. PC gaming with Gamehub improves as FEX/proton/wine improve along with graphics drivers
https://www.youtube.com/playlist?list=PL7v40tYqPYmiS-eDzrTnmpaAvebJsJfdz
Open source graphics drivers for the snapdragon 8 elite GPU's should be hitting early next year but is pretty good now. There are early emulators for android for PS3 and X360 just even worse compatibility than on PC so right now the high end and pretty good compatibility platforms for android are Nintendo Switch and PC
For me, it's all quality of life stuff. There are quest mods that people seem to like but I haven't tried any. The mods I use all all stuff like infinite stamina horse running. Zero inventory weight limits. Full experience from every quest regardless of how overleveled you are. No weapon degrading. No fall damage so I can jump down from heights in novagrad. That basic stuff I grab off steam workshop so it's always ready for my new game+ saves where I have an insane inventory. Nexus when I feel like trying the cooler stuff
Here's the quest mods sorted by endorsements on nexus
https://www.nexusmods.com/games/witcher3/mods?categoryName=Quests+and+Adventures&sort=endorsements
I hope the new expansion sparks a new mod era for witcher 3. Would love witcher 3 as the base game for quest mods rather than skyrim. Witcher 3 graphics just so nice to look at