If you use a computer with a large monitor, how often do you view web pages at full width. And why?

I'm beginning to see more sites use a responsive design that uses the browser size regardless of phone, tablet, laptop, wide screen, or tv. There are too many options out there to pre-program. Using something like PureCss or other responsive frameworks should help your design work for many users.

Large or small screen, I prefer webpages that do not require horizontal scrolling and aren't wider than 1024 pixels (current screen resolution on my MacBook Pro is 1440 x 900 pixels). I rarely change my browser window size and it annoys the crap out of me if I need to because a design isn't flexible. How often do I view webpages at the full width of my monitor? Never.

I have Quora at full width on my huge monitor right now. I do it mostly to block out the other windows so I can concentrate on one thing at a time. I wouldn't expect the content to take the full width.

I have an Apple cinema monitor on my laptop when its on my desk, and a 24" iMac. The answer is never.  Its the wrong ratio, and the whole point of having a big desktop is so I can see multiple windows at once.

I am on a 27' iMac. I tend to never view anything beyond the half of the screen. This is typically how my screen is setup: code editor on the right. Primary browser window on the top left, secondary browser window on the bottom left. I might view videos on Vimeo at full screen, perhaps once every 2 weeks. And I use

I have 2 22inch monitors at home and work. Most often I will be running different apps and web pages on the separate screens, but, occasionally I will stretch a page over both monitors. I try stretching it and if it looks ok, I leave it in the background, if not, resize it back to one screen. Btw in the City (of London/Financial services) 2 or more screens is pretty standard. Sometime I stretch it to make text easier to read (too lazy to zoom), sometimes to get more images on screen e.g. Flickr.