The game continues after the credits. You basically just go around doing whatever you want. It sucks that ingame you can only play the arena once, but once you beat it, you can play it all the time. My character was pretty cool. I went for the good-guy route. (Of course, I knew all the bad-guy tricks such as stealing and lock-picking. I just visited the Temple of Avo.) Doing this, I got people to like me, yet I owned virtually all of Oakvale, I was mayor of Browns-whatever, and I got the nifty title of "Paladin" that every NPC seemed to love to say.
Here's a little trick I stumbled upon while I was racking up my good points in the Temple of Avo. First off, you can get a lot of good points for just one coin. I made a max of 35 points off donating one coin. Second, I've seen on a lot of Fable forums that you have to donate large sums of money to get the special items such as the Paladin hero title, Sentius, and the Gift of Life. LIES! While I was putting in one coin at a time, I noticed one of the hooded guys say "It is a miracle! Avo has granted you the gift of life!" Sure enough, ten years were off my age. I kept putting in coin after coin and about two minutes later it said, "You continual donates have earned you a new title, go and spread the word of Avo." Sure enough I was the "Famous Infiltrator called Paladin". Then, after ten more minutes of depositing coins, I got Sentius (The most powerful mace in the game). All-in-all I only used up about 500 coins whereas people were talking about having to spend near 400000 coins. All it took was a little patients. =o