How personal is too personal?

I "think" about things, people, conversations, my husband, daughter and family a lot more than I used to these days. Probably more than I talk to anyone actually.

Sometimes I feel like I just have nothing to say and other times I could talk for days... 

I am usually a massive talker, an email and a texter and I most definitely wear my heart on my sleeve. Although this can be endearing at times can also be a downfall.  I have been told I tell people too much about my life, I talk about things that annoy or please me freely even if its close to home as I like to share my life with others...

But how much is too much, how personal is too personal for a blogging site?

How do you know that your personal life wont be compromised by some nasty reader out for no good OR will it even attract any readers being your life and not overly very interesting at all really?

I read a blog recently that had this quote in it which made me sad for the writer:

"I'm so boring, I've stopped talking"

OMG .... Is this what's happened to me?  
Have I become so engrossed in motherhood that this is all I can talk about?