Just write with your heart out, man.
It all boils down to what you want to accomplish in blogging. Are you in it for money? Or are you the type who just wants to express your thoughts in an open platform? Are you gunning to be a fashion blogger or a Sports authority guy in your area? It really depends on your priorities.
All I can tell you is just pour your heart out every time you write. Make sure your content is top notch. Eventually, whatever your priorities or goals are, as long as your content is great, you'll do fine.