If you focus your energies on writing only what interests others you will burn out real fast. Most bloggers give up after 3-6 months because they have no readers and very little traffic. The ones who truly love blogging and writing do so for themselves and don't care if they have 50 views in a day or 500.
Write what YOU want to write about, not what you think others might be interested in. I follow a wide range of blogs covering everything from every day life, fitness, weight loss, food, travel, photography and much more. All of these blogs are written by talented people who share what they've experienced and what they enjoy but none of them writes just to get traffic and readers. They do it because they love it, not to get attention.