Damn, I wish I had thought of this.

Artist and writer Dan Meth has created a series of cool pop culture charts at his web site, and the one on the right is a handy guide to sitcom homes. Sense a pattern? The shows in the top half all have kitchens on the left and living rooms on the right (how we see them via the camera angle), and the ones on the bottom have the living room on the left and the kitchen on the right.

I guess there are only so many things you can do on a sitcom, especially if it's filmed in front of an audience as many of these were.