What I hate the most is when I'm using a scrollbar and the infinite scroll adds more content to the bottom of the page and suddenly the scrollbar jerks up because I'm now 30% down the page instead of 15% down the page--then it takes me a minute to find where I was before the infinite scroll event. Happens to me ALL THE TIME. F-ing annoying. A "load more" button with some kind of ---------next page--------- line to delineate the new content would be preferable. The solution is to use the "Page Down" key but that's not always intuitive.
Also when infinite scroll is used on finite data. I have to spend 5 minuets awkwardly scrolling through pages to get to the end of a data set (I'm looking at you Soundcloud).
