I love to see Captain Scarlet and Thunderbirds come back as live action shows with Doctor Who-style production values.
I'm also excited about Red Dwarf X (based on promising reports from the studio audience) but I don't to wish for that because it's already happening
I'd love a new TV adaptation of Hitch Hiker's Guide, partly because I think David Mitchell and Robert Webb have exactly the right personalities/ dynamic to play Arthur Dent and Ford Prefect.