So I've been making my way through the Ninth and Tenth Doctor's runs on Doctor Who, having never seen the modern run of the show before the last few season's of Eleven's tenure. (But I have seen a lot of Classic Who, my dad being something of a Who nut who used to copy old episodes on VHS all the time.)
I watched Torchwood and a few of the Sarah Jane Adventures episodes and, even though Ten is not my favorite Doctor (sorry... I'm so very sorry,) I've got to say the writing on the overarching mythos has been fantastic. Simply fantastic.
I just now got to The Stolen Earth and seeing Torchwood, Sarah Jane, and the Doctor sharing the screen was simply awesome... but what I REALLY want to see is a spin-off show, or at least some more attention paid, to the Shadow Proclamation... because holy COW, the brief glimpse we got of the thing has been AMAZING.
What spin-off show from Doctor Who would you watch every week? I'd watch a Shadow Proclamation spinoff, a Paternoster Gang show, and a UNIT show. Hell, Agents of SHIELD practically IS a UNIT show, helicarrier and all.