Depth. It is what I most enjoy about the blogs I read. Depth both in content and quality of writing is what appeals most to me when I am reading a blog. The kind of content depth that forces you to pay attention when you a read a blog post to make sure you don't miss the point. The kind of writing depth that displays a nuanced command of the English language that allows one to read a blog post twice and still feel a sense of freshness the second time around.
A blog that satisfies my criteria is the Best Stock Trading In The World blog. A rather new blog with nine posts in July and eighteen in the current month of August, the Best Stock Trading In The World blog caught my eye a few weeks ago due to the quality of the writing and the depth of the content. To date the blog seems to be posting in a serial fashion as it proceeds to some unknown destination. As such I would recommend that one start at the beginning and read the posts in order to better understand the current posts as they build on each other.
As for what the blog is about I will simply quote from the title page and allow the author to describe it:
This is a blog about thinking. It operates under the pretense of being about the stock market. But this may not be so bad; the stock market as a world is a suitable world in which to think. It is suitable because it has a goal. There is at least but one world more suitable for thinking but that world cannot be so easily entered. It is sometimes said that “One must swim to stay afloat. One must eat to stay alive.” This blog is intended to conquer that. Let us conquer it together.