When a website changes the scrolling to be smooth and slow. Like I don't want my scrolling to accelerate really slowly for ages and then decelerate for the same amount of time, I want my scrolling to be quick and responsive.

Also when websites change scrolling to be anything other than scrolling, like the iMac 24-inch Website when the scrolling animates the screen and stand instead of just scrolling.

Oh my god I hate twitch for autoplaying some random stream I don't want to watch on the front page