I don't use a password manager because I don't always use the same computer. As a student I use a number of different machines on campus. A password manager would be extremely inconvenient.
I do, however, use a simple templated password. By including a few unique characters (following an easy to remember formula from the sites domain name) in an already strong base password, I can use dozens of unique passwords without any special environment.
There are several options which use remotely-saved, decrypted-in-browser password safes. You're still vulnerable to keyboard logging if you're using random systems/hardware. Accessing secure services you care about from multiple locations is not a good security practice.
If you carry a smartphone, there are several password safes available for these as well.
Clipperz (web-based) and KeePassDroid work for me.
On my primary systems, a simple text-based database GPG encrypted.
Your password template may or may not be good practice. From random cracking, probably safe. If someone takes a particular interest in you and has prior knowledge of your scheme and several revealed examples, other passwords may become discoverable.