So I'll preface my post with this: I'm going to be biased because I am a TES fan since Morrowind's release, way back in the early Naughties. Morrowind was, and in some ways still is, a unique sandbox game that is unlikely to be matched for its scope, depth and immersion. While my last Skyrim playthru was some time ago, I am sure I'll return at some point. I have sunk several hundred hours into it over multiple playthrus: Stealth Archer (because obvs), Pyromancer, Druid, Werewolf, Vampire so far. It's very good, but it's probably fair to say if you were going to play it, you would've done by now.
I think I'll get the most important aspect of Skyrim out of the way first and other stuff later. What Skyrim has, that few others can match, is immersion. I described it to a friend once as being the first TES game to pass "the singularity", by which I mean when game technology (hardware, engine, scope, design, aesthetic, mechanics, visuals, story/lore, etc) are all at a point where the world can really suck you in properly. It doesn't have the jank of older games.
What do I mean by this? Well to clarify, I'm not saying Skyrim is the best game (or even the best in the franchise), but it is a great game and one where the player can genuinely spend many dozens of hours and have them be meaningful. Other games can also have great open worlds, I'm not denying this either, but anyone who's played Skyrim will still know the towns and cities, the roads, the levels, the characters. You can be so many different things and it's so easy to get lost in the living, breathing world.
This is such an important aspect of a good game, the immersion, and Skyrim manages it in spades. It's why it's so popular and still sports such a huge community of modders and fans. It pulls you into the "secondary world" (as Tolkein would put it) and you can play so many different types of character, each of which can work and keep you immersed.
Beyond that, there's the fact that it's moddable. You can have so many more weapons, armours, pets, spells, alter gameplay mechanics, graphics changes, you name it, there's a mod for it. There's also a *lot* of content. The main quest is about 20ish hours, with the Civil War secondary quest about half that. Then there are four faction chains (Warriors, Mages, Assassins, Thieves), two expansive DLCs (Dawnguard and Dragonborn), about 15 or so Daedric quests and a host of side=quests. All of these activities reward really cool and powerful items, mostly differentiated by how useful they are to a given character. Modders have created expansion sized mods as well, expanding the game further.
If you enjoy sandbox games, fantasy RPGs and open-world approach, you won't go wrong. But if such a large game seems daunting, understandable, don't worry. You are missing out but people have different tastes and it's entirely reasonable that TES isn't your cup of tea. I would recommend it; it's an expansive, immersive experience and, while I don't think it's as good as Morrowind, I suspect it's impossible for any modern game to live up to games from that era. If there are other games you'd prefer to play, it's your prerogative and power to you, but if you give Skyrim a go, a couple of hours in you'll find yourself sucked in and suffering from "I'll just do one more thing." syndrome
