It bugs the shit out of me when I don't get "davidw". I know it's sort of silly, but I've been "davidw" since 1993, and I've grown kind of partial to it, as well as having a lot of muscle memory primed to type that at logins.
Coming from Toronto, I added the local airport code (YYZ) to my nick.
The problem is that what I thought would be pronounced as "slant why why zed/zee" came out to others as "slanty eyes".
Fortunately, I have slanted eyes, so I guess nobody can accuse my nick of being inaccurate.
This made me laugh a lot. I imagine it spoken by a slightly-embarrassed news anchor on the Simpsons.
They (none of whom were Asians) thought that I should change my nick because it was racist and/or offensive to Asians, despite the fact that I'm Asian myself.