What I like to see in a sims blog is different than what I actually put in my own blog. When I read another person's sims blog, I like really good pictures, short paragraphs to go with each picture...
Oh and the other thing I forgot to mention about other people's blogs is I like to see the premades that we all know (like Landgraabs, Goths, etc.). It's interesting to see what happened in their lives.