CP Recommendation:
Default hidden passwords wherever a password is displayed, with a toggle option to show password. The reason being is that I'm not always in a private place when I'm administering my server, and would rather not have people overlooking my shoulder taking note of the passwords. Something similar to this should do the trick:
http://jsfiddle.net/herdiansc/dnznh/8/
Would probably need to re-organize a few IDs, but seems easily doable.