Webcomics, I'm not going to name names for obvious reasons, but I just had to un-sub from a couple because I felt literally spammed by the guest art and "I've made a new chapter" notifications. I'm... not the biggest fan of the non episode pages. That includes fan art, Q&As and random illustrations. Isn't that what a twitter, tumblr or instagram is for? If I'm a big enough fan, I'll sniff it out. If I'm not, I find it incredibly off putting.
Apologies to people who enjoy seeing their fan art going up. I just find it really pulls me out of the story.
TV series, I'm incredibly fickle so the first episode usually decides whether I'll watch all of it or not. It's not often that I start a series, make it a whole season, then drop it later. I didn't finish Breaking Bad because I foolishly started watching it a few weeks before the finale, couldn't catch up and accidentally saw a spoiler when I was halfway through the penultimate series. In a couple of years time, when my memories are foggier, I'll try again.