I'm more of a sci-fi type fellow, throw some Star Wars or Mass Effect books/nerdstuffs at me and we're cool, but when it comes to fantasy, dragons, swords, and magic, I normally stay at arms length. Never quite caught my fancy, and really most of them seemed incredibly lame to me. I didn't get into the TES games until a while after Oblivion came out, because I kept seeing the ads and thinking how stupid it looked. At face value, it was another lolwut fantastical adventure game with more weird crap in it than Fable, which I played and enjoyed, because at the time I didn't really care about the story or setting, it was just fun to play. By the time Oblivion came out, I needed story and substance to the fun, because I am a geek.
A family member convinced me to get Oblivion though, and I ended up loving the game, the setting, the whole universe, and lore. So really, years later I still love it, and sometimes I'm tempted to even write my own little stories even. All that got me thinking, what made it so interesting to me? It's still got dragons, swords, and magic. It's still fantasy. I can look at something very similar to TES, and scoff at how lame it all seems to me. But why?
I think it's because Bethesda did a wonderful job over the years making this universe of theirs authentic. Now don't get me wrong, they've also got A LOT to it, I mean thousands of pages of books in one game alone speaks for itself, which no doubt helps, but a very well thought out, deep, and thorough lore can't stand on it's own, at least not with me. "Well, that's when the kingdoms of Hobablog and Mo'Nekid'Hos went to war with the Durkamomads ..." Yeah that's fantastic, but I don't know what the hell any of that is, why I should care, and how I as a person should give that even a slight shadow of a doubt.
So authenticity. No, I'm not saying realism - there is nothing realistic about shooting fire from your hands. But they have presented it in such a way, that I CAN suspend my belief far enough to allow that. The reactions, beliefs, mannerisms of every individual making up every race making up Tamriel make it believable to me that this, "... World exists, while you're playing the game." and beyond. Argonians are my favorite race, and their lore is interesting to me. Why? I've been eased into all this lore while playing the games, and reading the books in said games, which instead of telling the audience what has happened in a 30 minute cutscene, they instead leave it in books, which the character can pick up and read. It's amazing to me.
It's hard to explain it all really, but TES lore is just really cool to me for those reasons and more. When so many others have failed to draw me in, TES beckons and I jump in full throttle.
Therefore, I salute Bethesda, for doing a great job at making a wonderful world that I enjoy learning more about, and I hope they continue for many years to develop everything (Argonians bro!) with that believable and authentic touch that pulls this non-fantasy guy into it.