Is it much different size wise then the PS3 version? And Is Morrowind Bigger then Oblivion,its been a while and I cant remember? I have Oblivion on PS3 ...is it worth it to buy for the PC? Or should I just go buy Morrowind ?
Oblivion for PC, PS3 and Xbox 360 are identical, content wise, except with the PC you have the added perk of a huge number of all kinds of mods, so you ask "is it worth it?", I must say absolutely.
As for size, Oblivion's land is slightly bigger than Morrowind's land, but because of Oblivion's compass, which shows where everything closeby is, it can tend to feel a bit smaller than Morrowind, at least how I find it.
If you can/want, buy both, as they are both great games especially with all the mods out there. ;)