Duke, it's true that the Kings prefered all their 3 children marrying royals, then the parents of the other CPs in Europe also did. Infanta Sofia was born during a long weekend and JC was out of town. The King didn't even make it to the hospital to see Cristina after Irene was born, yeh, he loves his daughters so much more than his daughter-in-law

(big deal, just like most parents). I don't see any reason why JC should have walked with Paloma at the wedding of F&L, it didn't happen in any other royal wedding either. The marriage of JC and Sofia would not have survived today's media if they now were the CP couple of Spain IMO. I'm sure there are people in Spain who don't like Letizia, but there is no proof that this is the majority, quite the contract to what you said, majorities do believe she qualifies to be a successor to Sofia. Of course, she is different from Sofia, but she also has her advantage of being a Spanish woman.
Catango, I agree with you that Felipe had never appeared so cheerful, friendly and communicative before Letizia. For people who had met him at the Sydney Olympics, he appeared rather aloof, distant, not so friendly.
Guido, nobody here had said that Felipe had never been happy at any moment of his life before Letizia or with his exes, but there is this difference between escaping to a foreign land to feel happy/relaxed and happily embracing his royal duties and his people in Spain, even his (or Letizia's) distractors in the Spanish media admitted this difference.