I remember playing the games without mods and thinking about how boundless and amazing the world seemed to be. How you could be walking down a path and be shocked to see an Ayleid ruin, or how you'd find an interesting NPC you'd never met before. But, it wore off eventually... and then I discovered mods.
My first mod was the Dwemer Skyship (yeah, I didn't start playing the game much until 2 years ago), and after that I was stunned. I haven't nothing against people that do, but I don't download mods that add races or anything lore-breaking. If it adds cats or hawks I'm fine, but once it gets into adding random things that don't make sense in TES I try to avoid it, just 'cause I love TES.
I remember specifically how the cities felt without mods, for some reason. They all felt bigger... and I really don't know why but they did. Imperial city felt massive, you never really felt you knew your way around it. But then I downloaded tons of mods adding things to merchants and eventually I learned "coc ICMarketDistrictDivineElegance".
Loading up the game for the first time felt a world away from how I feel now. When I saw Khajiit and Argonians for the first time I was freaked out, that lasted for a few days, but I got used to them. I remember I wouldn't be a Dark Elf because they had bloodshot eyes, too.
I decided I'd be a Wood-Elf since the default male one had my skin-tone (I didn't know you could change skin-tone), and I tried to make him look like me, thinking back it was probably disgusting (I've gotten used to making faces).
I remember walking out of the prison, wandering down to the water, following the lake, being chased by a Bandit, running for my life and wondering how the #%!@ I was supposed to find anything, and then a wolf ended up killing me. I honestly thought the game was going to be much more dark and sinister than it was. The disk-case looked so ominous, lol. Don't judge a book by its cover.
Before mods I made characters who'd always be stealth because I was afraid of being scared... fear of fear.
I never roleplayed before mods, the idea never came to me. I was used to writing stories, drawing comics, roleplaying on forums, and stuff like that, but I took on pretty quickly after I saw how some people did it.
Early on I was afraid of the country of Cyrodiil because I didn't know what to expect. Especially because my friend who gave me the game told me "If you see a troll run to the water.", and I was asking him tons of questions about spells because the idea of being able to breathe underwater and walk on water due to a spell in a videogame was... the most amazing thing I'd ever heard of (at the time).
After I've remembered all of this, Oblivion is going to feel so different the next time I turn it on.