While I found your question funny, I must say that a 4:3 (or 3:2) ratio allows for better use of screen estate for a lot of work cases. I write a some music arrangements, and being able to view a larger vertical part of a score without having it zoomed out is a big benefit.

I also prefer it for programming. I cap my lines at either GNU lines or 92, meaning horizontal space is never a problem. Getting more vertical space in all Windows when I split my screen in 4 or 1+2 is nice.