Theme for my blog

Okay, so I'm told by most people that I can't just ramble endlessly on some medium out there in the void of the internet.  I need to pick some kind of theme.  My friends all have one.  Friend A uses hers to provide photos and updates on her family, Friend Al uses his for movie reviews, friend J uses hers to chronicle a medical journey, Friend S also uses his for movie reviews and movie news.  So what on earth should my theme be?  I could talk about medical issues, but I don't want to.  My journey is exceedingly personal that most people don't know about.  And if you're reading this and think you know what I'm talking about, you probably don't.  I've only shared it with one friend and limited family.  It's something that belongs on a support group message board, not a blog that could potentially one day be read by a future employer.  So that's out.  I don't really I don't feel like I have enough knowledge of Film Criticism to review movies.  I don't understand film structure.  Perhaps I could critique television shows, I do watch a lot.  I could provide updates on my family, but I only have a husband at the moment.  Which....I don't want to talk about.  Perhaps for now I will simply keep thinking.  Any suggestions?  Oh that's right, no one knows this blog exists.