I want Jakey to be like he was these last couple of weeks - strong, sensitive, slightly moody side, got a bit of a brutal streak when he needs to. Not saying I don't want him to grow as a a character, but I don't want him to go to either extreme of being a complete bad boy, or a completely goodie.
I want to know where the hell his mother was/is. I think his mother coming back (as she is never mentioned, my theory is that she ran out on the family leaving the boys with their dad) would be a better story than his dad appearing, as that could seem slightly predictable.
I don't want him thrown into a romance straight away once Chrissie leaves, but if one naturally develops that wouldn't bug me too much. I think he needs a few close friends around the square (maybe Dennis?) as now Danny's gone, Alfie's leaving at the end of the year, and Chrissie's going, he may be slightly adrift. So I think they need to start laying down those roots when he comes back, rather than "Now Alfie's gone, he's suddenly BFF with Dennis."
I think he's definitely going to play a part in the outcome of Den's body storyline, so I can't wait to see how. :D