Sly Cooper is also my favorite game series. I was so into the story when I played Sly 2 and 3 that sometimes when I had finished a chapter, I almost went "No, I can`t start a new chapter right away, the gang needs to rest a little".
Sly and Carmelita are also an awesome couple, there is such a tremendous passion behind. I will be really disappointed if in Sly 4, they just go back to the old where she`s chasing him, like they don`t take into consideration the ending of Sly 3. That will just prove them to be lazy, they think it will be too difficult to make an interesting game where they are a couple. It`s much easier for them when it`s cop and robber. Well, I hope they will really take that challenge.