The very first year I didn't see live (as in, while the series was airing weekly). Caught up online in later months.
The series with Jill & Darren, hardly watched any live, but caught up later online. I think I watched the 'famous' Jive actually proper live on the airing date, unless I imagined I did, but I think I did.
The series with Darren & Lilya, hardly watched live again, but caught up later online.
Mark Ramps & Karen is the first series I watched from start to finish, in ever LIVE sense (when not out getting drunk), and was well and truly hooked. From this series onwards, I've watched every year!
Was particularly great Uni viewing, helped bonding in our house, and used it in living situ post it for same reason.
So 10 full series watched, and now this 11th in the the process of.
I think I qualify as a near super fan.