Elder Scrolls and everything about it :)

skyrim, all because of the modding support.

when it comes to raw, vanilla gameplay: daggerfall.

when it comes to modern raw gameplay: morrowind.

That's a difficult one. I had a great time with Morrowind, but Skyrim is way more modern. Morrowind was way more immersive and made sense and had way more depth and detail to it while Skyrim was graphically polished and cut straight to the point of the core mechanics. I think I'll have to play them again to get a better comparison.

oblivion for the nostalgic “haha” moments when the npc do their… things 

skyrim cuz, you can kill dragons!!!! but can’t marry serana :( 

the mods made skyrim the inmortal flag of bethesda and added a tons of replays and things to try, skyrim is definitely huge! thank you modders! 

never played morrowind but i will give it a chance one day

arena and daggerfall (unity) are amazing and made me more interested about the lore

teso, never played it xd