AGP? Now you 1x, 2x, 4x and 8x. Also have version 1.0, 2.0 and 3.0 (last time I checked) of the specs. A 2x slot can be 1.0 or 2.0 - some cards won't work with 1.0. This is simple?
Give me an IRQ conflict any day. Not just DOS - my mum's laptop has one and it's a modern machine running Windows ME (I didn't install it).