A real drawback of a pulldown they’re hard to scan. If designers use the standard HTML pulldown menu, they have no control over the font, spacing, or formatting of the list to make them more readable, and there’s no really good way to divide the list into subgroups.
Don’t make me think
Being an expert in online usability Krug gathered his experience in a wonderful book. This summary of key thoughts will help you to remember most important principles and laws.