Yep. Taking the course now, and out of all my math courses (calc 1-3, matrix theory&linear algebra , abstract algebra I & II, linear programming, and real analysis) I'd have to say that it's the worst. Not because it's difficult, but because it's so boring. It seems to me, and this probably has a lot to do with my particular class, that the entire thing is set up as a recipe book. You look at the DE, decide what grouping it falls under, and apply repeated mechanical mindless steps to eventually get to a meaningless (and often rather ugly) answer. I'll conceed that they are useful, but mathematically speaking, especially at the procedural level I'm exposed to at the moment, they are no fun at all.