One of the great things about a free market are the options. In today's computer market there are options between brands and even within brands. Cooler Master's High Air Flow (HAF) series is one example of products designed to fit a range of different needs.
Can fit 13" video cards; Modular 3.5" drive bay; Many configuration options; Extra space under motherboard tray; Spacious for it's size; Room for many extra fans; Compatible with internal or external radiator; Quick install time; Many cable routing options
Not enough hard drive damping; Only one tool-less 5.25" bay; A screwdriver required to install most hardware; Only two fans by default