There has to be a thousand words, or variants you could have come up with over a month of thought. Don't you have access to a dictionary or a thesarus? Heck, any book for that matter could produce plenty of ideas for variants.
xistence
xanth
xerosis
xenon
xpert
xchromo
xrayz
xerxes
nox
renox
dinox
clearx
nosox
xtrasox
extrasox
buymysox
There, I took an X theme, and a dictionary and some imagination, and came up with plenty of decent ideas. Maybe some are already used, but I imagine that a unique and personal name is not that hard to come up with. Yanksfan is fine, but like you said, it seems to come with plenty of stigma, and not a whole lot of individuality.
Open your mind to more than what you see around you. It can be an adventure.
Edit: BTW, I don't have a fettish for the letter X, I ended up with the X in my handle since Tracer was already taken, so the next coolest thing I could think of was to add an X instead of a number. About a minute and a half of thought there. I just chose an X theme for this example because it seemed like a difficult letter to come up with ideas for. Thought I would answer this question before it was asked.
