What the h*ck are you blogging about?

So, I am just wondering if we have any target niche here.
As for me, I am running several blogs of different niches.
One is for cleaning tips
One is about ebook creation which I had recently shifted to [url=http://www.maxvalue.wordpress.com]wordpress.
But then I am thinking of using the blogspot again.
And another one is [url=http://www.miriguy.com]my own personal blog, but there are various categories in it.
Still finding the right tune for it.
So, in miriguy.com I have various categories like marketing tips, travel tips, journal and anything that relates to my daily life.
So, what about the rest.
Perhaps we can come up with a new undiscovered niche.