the way he killed the crossroad demon, he doesn't seem the same

Yeah - I agree. And that demon in sin city - I was surprised - it just seemed so cold.

I think he has changed, but he's still the same Sam. The change didn't come because he brought something back with him when he died, the change came because he trusted someone and then was murdered by them. He might have just lost his faith in humankind.

He´s killed a lot of poeple/things since he came back. Not something evil but cold. He thought it much more when he neaded to kill madison in season 2

i still think hes sexy.....even if hes starting to get more evil

I agree, he's different now, but that makes him more interesting I think...

haha Liih I agree!

He didn't spare jake but jake desrved it anyway for killing sam!

I'm not sure if I agree with stoptheinsanity- although I think that it's a possibility that his increasing coldness and ruthlessness is a result of natural factors so to speak- I also think that it's a possibility that there is a demon side to him that is slowly getting stronger. Either way, he's definitely inching over to the dark side.

He's definitely different now.

I would say that Sam is different but only because he has had to be tough after losing his brother.
I hope that in the end he can overcome his Demons.

I think after realizing demon blood is yummy and torchering people for answers I think he's changed completely. He had to save Dean on numerous occasions of which death is involved. Sam is strong but he can only take so much persuasion. Hopefully he does overcome it and doesn't have to have that big war with Dean and the angels ;[

Note: meg and azazel always say "howdy!" and Sam never said it until after he was resurrcted he says "howdy jake" it's a thin lead but he was so cold when he killed jake! :( I like my little sammy good not evil :(

sam does seem different, I m not sure if hes Evil again,maybe its just because of all the crap hes been through ,cause I want sweet sammy back!!!!!!!love sam!!!!!!!!!!!!!!