I really enjoyed making a blog and I think that I will continue. Because, first I have learned a lot of English like vocabulary and grammar. Second I have seized the opportunity to put in order ideas that I have and I can not work in it, understanding that I have not much time and I have the bad habit of only pay attention to evaluate things. So, this way I could do two things at the same time around the topics that you used say us.
This method helped me to think in English. Write about open topics makes you utilize the language in your own form. The things I always think are now in English too in my mind. This is useful to me to read technical literature of the topics that interest me, like How Nature works by Per Bak that it is not translated to Spanish. (I have exhausted the scant literature in Spanish about fractals and systems theory).
I do not think that write a blog have disadvantages. The advantages are evident; you can do this anywhere and at any time. You just have to sort your time. Also, the open topics make you can do this wherever you want, to personalized learning. Additionally you correct us online, so we can learn of our mistakes.
It only remains to say I thank you.