I've only been part of the Doctor Who fandom AFTER I've seen series 1,2 (and most of series 3)and I thought that there was an underlying thing in the "You're not ...?"I didn't really think of shipping before that but when I heard that... well... Then the Runaway Bride... that made it even more official for me.

I didn't start heavily, obsessively shipping them until I watched S2 (two years later), S3, what was done of S4 at that point (up 4.7). I have a weird history with DW. LOL!