[spoilers] Harry and Ruth

[almh]

I think it's because they've developed over time, aren't stupid characters (like people thought Ben was - why I keep picking on him today I don't know,) are interesting to listen to (Harry because he gets all the cool lines and Ruth because she actually knows what's going on - as they said in the audio commentary, if they listened to Ruth then they'd be able to solve the episode in 15 minutes,) are superbly acted... and also because I'm a hopeless romantic and I just think that they fit together beautifully I think it's the culmination of things.

As for why Harry and Ruth? Well, I like Ruth. And I like Harry. Good enough reason? lol. I think it was that their relationship seems so natural, it's been building up for series. And their relationship is the only "quaint" and, in my mind, truly romantic relationship. The others never really had that romantic relationship, it all just went from I like you to sex.