People often enjoy reading personal posts as long as the personal part is used as context to say things that are otherwise interesting. Most personal posts on the internet do not fit this mould and are completely uninteresting to a random reader but it is entirely possible (I think my blog achieves it, but I am surely biased) to have personal information and still make it appealing to the masses.
It takes a certain kind of person to be able to post about their personal decisions and life choices in a really revealing manner. Some people can hack it, others can't.
My personal story is that my wife has certain limits about what she wants to appear on my blog and I try to respect those. Question is, does this personal anecdote actually add anything to my post?