That really is the downside of watching Torchwood, so many missed opportunities. We learned very little about most of the characters until right before they were killed off. We never even got to see where Ianto lived when he wasn't at work. Could be forgiven for thinking he was filed down in the archives at night.

Still, it does give us more room to come up with our versions of how things should have gone. Gareth was so good, I would have loved to see more. Same with Burn Gorman and Naoko Mori.