Oh, also completed Brotherhood in Oblivion.
if you approach it as a different game it actually is still quite fun
Well, at first I couldn't at all play it, so I uninstalled it [and this happened like twice]. Third time I installed oblivion, I tried to approach it as a different game and managed to play it :C
I'm not even rating oblivion as a bad game, I just couldn't enjoy it well. At some point I had to shit around with console to make things funnier.
But still it isn't as bad as fallout 3 shock. I had to make four attempts to finish the main quest. First try was uninstall after leaving vault. Second after doing some shit in megaton. Third was actually doing something everywhere, but not much and not finishing the main quest at all. Finally at fourth try I finished it lol.
On the other hand I very much liked NV, explored 100% of the map etc.