One rule of Wiki to stick with: never trust someone with quote from Jimbo Wales on their user page, unless they ARE Jimbo Wales.
I've been editing Wiki off and on with various user names since 2003. I don't like sticking with a user name too long, because I've found that people start reacting to the user name more than the quality of the edits after a bit.
I generally try to look for reasons to keep articles rather than delete, though I'm not one to include every little thing under the sun.