We had to watch The Odyssey in high school. Woof, although I liked the shot of Troy burning, which weirdly stuck in my memory for a long time. (the rest was crap)
If you're talking about stuff like The 10th Kingdom, yeah, that stuff can't be well remembered or watched. Lots of miniseries just end up on the pile. I wonder if the John F. Kennedy miniseries from 1983 with Martin Sheen is worth a shit.