TL;DR: Skyrim is not a good game and it's not a bad game it's average... but it's addictive. The thing that made Skyrim playable was the soundtrack, the audio is the only thing that makes this game replayable. I love the audio, ambient sounds and music of the game!Modded vs. unmodded TES games:
Unmodded:
Skyrim was "good" for about 40 hours
Oblivion was "good" for about 5 hours
Morrowind is still "good" after 200+ hours
Modded:
Skyrim is decent enough to casually play, but you'd better be in a "completionist" mindset, the goal being to complete quests, complete faction questlines etc. the quests, combat or rewards themselves are meh
Oblivion... is unplayable without mods... and after installing mods I just stacked potions and rushed through main quest being relieved that it was all over when done... it was still... bad with 30+ mods.
Morrowind doesn't need no mods! Vanilla is awesome!
And for all you modders out there... after finding nexusmods page this is the danger of all those mods...