I've always been fond of the poem by William Blake:

TIGER, tiger, burning bright
In the forests of the night,
What immortal hand or eye
Could frame thy fearful symmetry?

The number 75 is the year I was born. Add to it that white tigers are my fave animal. A lot of people seem to want to use tiger as an online name, I put the "Y" in there so I could get the name I want pretty much on every forum I go to.

JYD#70 Warning! There are more than just dogs in this yard!