Bkev, the nice thing about Oblivion (and FO3, which is the same engine) is that you can rush through the campaign fairly quickly, but they are extremely open ended so you can spend as much time as you like wandering around the world and doing side missions until you get tired of it.

RedFive, Watchmen: The End is Nigh kind of sucks. There is a playable demo, which will give you a taste for it. Only reason I have it is that I grabbed a used rental copy at Blockbuster during one of their buy two get one free deals, altogether I payed less than $5 for it. It is basically an arcade beat em up, very repetitive button masher. If you like/don't mind that sort of thing (I'm not a big fan) and are a huge Watchmen nut (which I am), then you might enjoy it (I didn't).