What makes you like these blogs?
People with the same interests? (That's a big one... considering the size of the Tri-Blog Alliance including its official and unofficial members.)
Do you like training details? Race reports?
A variety of topics, including sketches of personal lives, current-news commentaries, heated discussions, humor? (I vote big for humor but can't seem to get the hang of producing it myself.)
Short posts? Long and detailed? Photos?
When you visit a blog, what keeps you coming back?