SmartPlanet has a list of the 25 worst passwords of 2011. It’s good to read the comments as well.
Computer people tend to make the error of thinking that any password that’s hard to guess is good, and the harder the better. But the fact is that people tend to write down passwords that are hard to remember. I’ve often gotten the “how did you guess?” look of awe from a client when I log directly into their machine. They think I pulled some sort of magic, when I’m actually reading their password off a note they left near the monitor.
If you can come up with a combination of letters, symbols, and numbers, involving both upper and lower case that you can remember well, then it’s good. But you might have to back off a bit so you can remember it rather than making it available near your workstation.