I have never watched Lost either, and people always assume I have and I think I've heard way too many spoilers now for it to be worth it.
I've definitely heard spoilers (which I probably forget at this point) but I don't mind watching for myself, it's just finding the time! I'd rather watch something more relevant so I can see it *before* I get spoilers if I can LOL
That and I never know what shows my husband will want to watch!! We watch most of our shows together as we like the same stuff for the most part, but I have a few small shows/movies I watch when he's not around. When it comes to starting a new show to marathon, like Lost, my luck will be I'll start it and he'll be like "Why didn't you wait?!" Even when I ask him first if he minds and he says no, it's a 50-50 chance that he'll either hear me talk about it or catch a bit of it and think it sounds interesting and like something he wants to watch too but he never makes time to catch up to me so I end up in a holding limbo lol