It would really have to depend on your computer, if you got an average one or below average then I might tend to go to the console systems. If you have a decent computer though you cant go wrong with the pc. Especially if you want to mod, a pc is a MUST. (Which is the main reason why oblivion is such a good game, the ability to mod it.)
If your just a casual gamer though and have a crap pc go with the console, if you are a real gamer and you like to customize your experience with the game go with PC, it will prove to be a much more enjoyable experience.
PC!!!!!!!!!!!!!!!!!!!!!!!!!
well i find pc more unreliable due to crashes and lost files and personally go with the 360 as its more reliable
I use PC and have never had these problems