I should have said some web pages -- specifically, some internal work web pages are horizontally intensive. Also I was forced to run the vertical monitor in less than full resolution due to an issue with dual screen support and the video cards we have at work. My other monitor is 30" and runs at 2560 x 1600, and I was running into a problem with max supported resolution for the two combined. The details are fuzzy, but it suffices to say that it was not ideal. That and lengthy terminal output was hard to read at the narrower width, and having a terminal open on the second monitor to display output from the application running on the main monitor was one of my prime use cases.