I picked mine cuz I didn't wanna sign the name on my birth certificate to my posts, but I also didn't want to be an unnamed guest (let's not rekindle that rant though ;D )

I am mostly of celtic blood, however, if you combine the mixture handed down from my Mother and my Father, it's more than 3/4.

Or, you could just attribute it to the ease in which my "Irish" can be got. ;D