But that's just my opinion. The point is it really pays to try different conductors, performers and performances before the 1830s or so. I'm not sure why that time changes things, but I'd guess the romantic style that came after more closely aligns with artsy-fartsy performance practices, and that composers also became more careful about marking how their works should be performed. Anyway, trying different things is also a good exercise in developing personal taste, which is a key ingredient of music appreciation.
[1] I originally had von Karajan here, but I went back to have a listen and it wasn't as bad as I remembered. Substituted Furtwängler's inexplicably famous recordings, which sound like the entire orchestra took Valium: https://www.youtube.com/watch?v=3bOxcryX1VE . Compare to Beethoven's recommended tempo and historical style: https://www.youtube.com/watch?v=-Y07M8e5g-Y