Of all the TES games Oblivion has aged the worst. If you didn’t play it at the time its really hard to be objective about it now. Too much Bloom and ugly potato faces combined with its floaty, clunky combat make it a chore to play today. Game had some great quest writing though and Shivering Isles is a GOAT expansion. It also has an undeniable, if somewhat unintentional, goofy charm to it that I love.
At the time a lot of Morrowind fans hated it for going against established lore and “dumbing down” the series, but it did well critically and was generally well received by the public. It got a lot of people, including myself, into the series. I went back and played Morrowind and loved it so I can see a lot of Oblivion’s weaknesses more clearly, but I still have a soft nostalgic spot for it in my heart.