If I have to sidescroll without good and sufficient reason, I'm gone. There's no 'page sideways' button on my computer the way there is a 'page up' and 'page down'. The one time I sidescrolled without complaining about it was an epic comic that I'd already gotten into, doing a special strip, though I can't seem to find it anymore.

Anything that makes me scroll up and down, or side to side back and forth, is right out. I shouldn't have to scroll down to read, then scroll back up to keep reading. Nor should I have to scroll down to read, then back up to find the navigation button I want next.

It shouldn't give me a headache by glaring at me or flashing at me.