Buffy the Vampire Slayer
This was/is a pretty huge one. I loved Firefly, Dollhouse and anyone who reads my blog/Tumblr knows exactly how much I love Agents of S.H.I.E.L.D. But Buffy, to me, was one of those tacky teen shows that was on channel 5 when it first launched and I had no interest in them. It was the acting that seemed wooden, the plastic faces, the fact it looked like a live action Scooby-Doo show and I wasn't interested. Only when I went to college then Uni did I realise it's impact. I'm still not keen to watch it and I don't think I will. My Buffy experienced started and ended swiftly when I watched the 90s movie that came before the show.
The Walking Dead
Once Upon a Time
I watched 2 seasons and a few episodes of 3 then stopped. This seems to be a running theme. I watched the series originally to see how this was going to replace the would-be 'Fables' comic TV series and of course it cannot even be compared. Fables is obviously superior and nothing liked the ABC show. I hated the first season and skipped a few episodes after a few minutes, mainly because I was bored if it was a character I didn't like. I hated the format. It didn't work. Having flashbacks that were not necessary in every episode slowed the real story. The second season picked up and even season three was pretty good BUT as I missed more and more episodes I left it. I tried picking it up again but I wasn't enjoying how things were unfolding and how some characters were portrayed, so, yes, I left it and I really don't 'get' the thousands of gifs that appear in my Tumblr feed.
Anything on the CW channel