Another blog or just more content?

And there is the question once more.
Should I open new blog for my new passion "Fountain Pens" and "Stationary" or just add more content to one of my existing blogs?
A tough decision, since my post frequency is quite low. On the other hand, I totally get that people don't like blogs with "everything" in it. This only works on such microblogs as this one, where you expect just posts of my life.

I'll keep on thinking about that and posting videos of pens on YouTube. Maybe I should just keep on doing that there exclusively. Oh but wait... the same problem O.o. Another channel or just add more content? *sigh*