Most of my reading is fantasy. I skim fight scenes every time. If it turns out to just be back and forth trading of blows I skip forward entirely.

I used to read all of it out of a misguided sense of completionism but my retention of those scenes was just as bad as if I'd skimmed anyways.

For mechanics and all, definitely fanfic, but Kushiel's Dart's "love as thou wilt" messaging really helped form my attitudes and ethical views.