I remember the good old days when I would see poor sods spending 6 hours beating Blood Harvest on Expert, and I was kind of proud of myself thinking that I would never be that way... that was, until, I spent about that much time beating Dark Carnival (in my defense, I took a break to punch Mexican children). I celebrated by beating The Parish in 42 minutes, which is far from my best but not bad considering that level is tantamount to staring into a fluorescent light
p.s. the only difficulties are expert and versus