So, I decided to play its predecessor because everyone said it was better than OB.
And it was. I love that game. I've been playing it for the past 4 months, almost non-stop (its even funner when you don't use any guides), though my schoolwork has taken a big hit (I do online homeschooling, and have motivation problems).
So, I think we all most of us agree that MW is better than oblivion in almost every way (content, quests, spells, armor, depth, etc).
Though, I liked oblivion, after playing MW, oblivion just didn't seem fun anymore.
But, as long as Skyrim is on par with Oblivion, I'll be happy.