Yes, tagging blog entries is also a possibility - I could probably embed the blog somewhere in my website.
A side effect (which entails both pluses and minuses) is that by using a blog I might curate the links a bit more: with Google plus most of the time I just paste the link and select the appropriate circles.
If you go with blogspot, you can also use pages to better organize posts. You have an RPG page and a calligraphy page and you list new posts on the appropriate page. If you remember to do it consistently at the time you create the post, it's an extra 30 seconds of work. It's only a pain if you forget for long periods and have to devote time to going back through a bunch of posts
Tags seem to me to be the best solution because sometimes a post would have been shared to multiple circles: e.g. a link to an article about historical Samurai weapons/tactics could go to "martial arts", "Japanese language and culture", "Role playing games".
