I use a soft-ish guideline of 100 columns per line, but I mostly code in C# at work, so normally namespace/class/try-catch is already 3 indentations, and 80 cha

I use a soft-ish guideline of 100 columns per line, but I mostly code in C# at work, so normally namespace/class/try-catch is already 3 indentations, and 80 chars is simply not enough for everything. I do my best to keep it between 80 and 100 chars. With a horizontal screen resolution of 1920 pixels, 2 pages of such code fit nicely side by side.