I tend to not resize the browser ever, except when developing/testing sites to make sure they render properly on different screens sizes. I use a 27" monitor and I like reading full-width. As I said in my original comment, I find the act of syncing my eyes with scrolling text to be very distracting, whereas reading a very wide column of text to be very easy. Depending on the website's default font face and size I might use the browser's text zoom feature to enlarge the font, but I still like reading full-width.