I wouldn't mind reading your "rant" or whatever bursts you might have! I like mish-mash blogs, especially personal stories! It is you, represents you, and it says you have "multi-talent". On days that I visit and you happen to write something that I don't have time to give my full attention, there are your other posts that I can visit.

I am not a "niche" writer as to me it is too restricted to my creative flow! When visiting a "niche" blog, reading the same subject over and over can get very boring too. As human, we all have gone through many different experiences and solve many different problems, in our own ways. It is never the same for everyone.

In the end though, you know what is best for you! Go with your gut instinct...