Laptop: Hate the whole concept, it's a joke to me. At the same time love it for it's low power consumption.
Anyway, ON topic, I hate the display, I mean I can never find a good angle and read on! I push the lid at furthest possible to read stuffs comfortably but at the same time I miss all the details from the screen! Poor viewing angles. Yeah I know mine's cheap but still.
Desktop: The thing I hate about it is that I might suffer and die without it, period.