I really actually don't want to see Jack again. Ever.
It's too bad, I actually rewatched The Doctor Dances yesterday and he started off really strong; a charming, morally-ambiguous, con man who had 2 years of memories missing and was plagued by what he might have done... good stuff.
Unfortunately all of that was totally squandered post-season 1, so that by the time we got to Miracle Day the character had devolved into a camp, flabby joke spouting off slightly grubby innuendos as the rest of the cast visibly struggle not to roll their eyes.
He's the River Song of the Davies era.