They're boring in part because you're seeing big-budget movies, with a small army's worth of effects crews. When it takes something like twenty minutes for all the names to scroll by slowly enough for you to pick out the name of your cousin's brother who worked at Foobar Digital, there's just kind of not much you can do. If you've got a really big budget you might have some animation going on during the end credits, or at least cool images - but even those usually taper out once you start listing the seventeen different effects houses you outsourced scenes to.

It's a lot more bearable if you watch movies that aren't full of effects.