Okay... after last nights epi, I was slighty angered with all the Jack/Gwen stuff. Though after thinking heavily on it while in the shower this morning (yes, I quite often think TW while in the shower.. LMAO), I have a few theories. One is a bit of a stretch, the other, not so much... (I realize this would be better off in the TW Discussion thread, but it has to do heavily with our favourite ship!)
1. I think the reason Jack is so pushy and clingy with Gwen is because she is able to show him a different side of himself. She, untill last night, was still able to seperate Torchwood and a life outside it, which is something none of the rest of them and Jack least of all is able to do. He saw her having the type of life that he can never have (and obviously wishes he could with Ianto). He'll never get to grow old and die with his love. Instead he'll have to watch as Ianto grows old and dies and he'll loose yet another great love in his life. So I feel that he is so passionate with Gwen, not because he loves/wants her in the way he loves/wants his canon relationship, but because he wants what she has in life.
(the more far out there one)
2. Okay, this one is a bit of a stretch, but something hit me when Jack was in the van with Rhys. He kept passionately saying that Gwen had to be the one. Upon first glance, to us and Rhys, we could only assume that he had wanted her there for...personal reasons? But, I was thinking this morning that the reasons quite possibly aren't as personal as we'd probably thought. All along, Jack mantra has been "The 21st century is when it all changes". We know that he's from the future. Could it be possible that he knows Gwen has something to do with the big changes that occur? Maybe her name is down in history as doing something great and he's been waiting to meet up with her... I donno, I realize that's a stretch...