I think it could truly be either vampire. I'm rooting for Eric, too. In the books, he is way more interesting and complex than Bill. Bill does acknowledge Eric's joie de vivre and that he understands why Eric and Sookie would be very good for each other. But he is still the dark horse in the running. Charlaine Harris is slowly letting him redeem himself, and to be fair, many of the betrayals have not been entirely his choice. I think his simple farming roots and his grip on his humanity have let him be a very gentlemanly introduction to vampires for Sookie. Has she outgrown him, though? Eric likes power, but he has a far better understanding and respect for Sookie's independence. Bill would get very paternal and could be a bit smothering. It will be interesting, either way. But yeah, go Viking, go!
The show is an entirely different matter. I think they have done an excellent job of casting Bill on the show and that they are going to twist storylines to make sure that Stephen Moyer stays central to the storyline. This will be challenging, even for Season Three. They have obviously created another reason for him to be kidnapped and tortured, as his database does not exist in the show. And they are making choices that seem to really incriminate Eric (that whole plotline with the Queen and Eric getting Lafayette to sell V). I also wonder if Anna Paquin and Alexander Skarsgard will have the same chemistry that she and Stephen Moyer do?
Casting for Quinn. Hmmmmm. In the book, I think he's white (she talks about his olive skin tone?), but I have a feeling that they might go black or even East Asian. He would have to be a very big, muscular actor. I don't even have a guess, to be honest.
Alcide Herveaux is another one that I am curious about. He is described as another very large, built man with lots of shaggy black hair. I almost start thinking about some of the X-men casting, like Wolverine?
Will they do Claudine? I think so, because they are supposed to reveal that Sookie is not human in the next season, apparently.
Slightly off topic, but I have spotted some confusing choices in the show. They are making out that V is so potent that just a drop will get you high and that drinking a full vial is "ODing", so then why was Sookie okay when she drank more than that from Bill and Eric? If blood sharing sometimes happens between fangbangers and vampires, why are the fangbangers okay if they have a few mouthfuls straight from a vampire, but V junkies have serious consequences with that same amount? They haven't really addressed that yet.
Anyway, I am more curious than anything about how the show will interpret each novel. I don't know if they will do all 10-13 books, though. That would be a very long series. As I've said before, I feel that each medium stands on it's own very well, so changes in the show don't take away from the books for me.