Hi there!
You’re right, there’s no one answer - we were asking this not so long ago ourselves. Ultimately I think it depends on what people are looking for at the time, but we have always found that we get the most interest if we have travelled somewhere that most people haven’t, and likewise we are always looking for information about places that aren’t often visited and blogs are the first place we go.
Our blogging has been focussed around our videos and Instagram, and we have just opened up a Tumblr to start doing written blogs as well. The most important thing that we have learnt after six months of nonstop travel and documenting of said travel is to decide why you are blogging. Travel blogs are a hard thing to get to the forefront these days (and we have had many ups and downs with it already) and for us, even though we want to share our journey with as many people as possible, we need to remember that the main reason we are doing it is to have a living, breathing account of our adventures to share with our family and friends as well reflect on for ourselves in the future. Don’t let driving the success of your blog overpower the joy of creating it!
All that said, your website looks great! You have got a couple of new readers right here.