I liked Zlatans interview, he spoke honestly. Told everyone about his conversation with Moratti months ago and gave a lot of respect to him for letting him go to Barcelona. He wanted this move for his career more than anything. For all the talk of his ego it seems he still feels he has a lot to prove and seeing as Ibrahimovic has been a success at every club he's played for i wouldnt expect anything less at Barcelona.
Also you have to take into account the character of the man, as a young player he was a bit wild, a bit immature but now he has really grown up. His maturity and desire for the game cannot be questioned anymore and he will give everything to make a success of his time at Barcelona.
Also to anyone comparing him with Eto'o purely based on goal scoring don't know much about Ibrahimovic. I dont know the official stats but i'd bank on Ibra having at least 15 odd assists a season but even then it is more than that. Maybe ask Interista because he'll have watched all inters games but i'd say that a massive majority of goals scored by Inter involved Zlatan in some crucial way.