One thing I enjoy doing is setting up fake services such as FTP and just collecting the usernames and passwords that people (or more likely automated scripts) are trying to gain access with.
One recent observation showed that in addition to the common passwords of abc123, password, and letmein. That common keyboard patterns were also tried, such as qwertyuiop, zxcvbnm, qazwsxedc, 1qa2ws3ed. Another attacker decided to try some more obscure passwords.By googling some of these, it looks like the script may have been looking for a machine infected with a backdoor that was released in 2004! Those passwords were: pulamea, muietie, n-am_prins_parola, and pulanpizda.