Totally depends. If it's really late or early and I'm not expecting an IM, maximized. If I'm IMing, Venting, or whatever, windowed. Sometimes windowed with 2 Pirates running. One very memorable night I had 3 different IMs, Vent, and Pirates all running in different windows at the same time. It was also a very busy guild night, and the guild chat was hopping too. Talk about lag!