"This is my blog. There are many like it, but this one is mine. My blog is my best friend. It is my life. I must master it as I must master my life. My blog, without me, is useless. Without my blog, I am useless. I must fire my blog true. I must blog straighter than my enemy who is trying to kill me. I must shoot him before he shoots me."
There may be something out there like that, but that doesn't mean you shouldn't start your own.
There are a million tattoo blogs out there that get updated 10000 times a day, but I love mine and think it fills in a little niche- you should do the same.