I am really not a fan of writing LinkBait and truly try not to participate in writing things for the sole purpose of getting links even though it has been blessed by folks like Matt Cutts. I sometimes write things that I hope get spread and passed around, but certainly do not think of them as LinkBait.
I try to write things as ThinkBait; posts that are thought provoking and generate dialogue.
This is my way of flushing out my own thoughts on a subject, asking folks their opinions, and of course use this platform as a way to learn more.
I think if a post generates a sizable discussion and even rebuttal posts you have ThinkBait – anything else is just LinkBait.