I don't need every post to be a study, that's not what I think of as "quality". However, I do think that a quality post is on topic and communicates something which is of interest to other people.
The journal and many of the album reviews have a generally higher quality because communicating it
right is more important so people generally try harder. I think if you want to share a thought or idea, you should always try to communicate it really well, even if it's just a regular post. Some people seem to just regurgitate whatever's on their mind without processing those thoughts into a proper presentable shape first (again the damned lists come to mind).
To Erica, a classical journal sounds like an interesting idea. It would also be the first of it's kind around here.