I recently came across this interesting article by Joe Carter, a self-described evangelical. He does not concern himself with passing fads, such as the WWJD, but rather with "faddage that becomes a fixture." He observes--correctly, I think--that once fads become fixtures, they remain unquestioned. Carter has a list of 10, all good.
#5 Testimonies. Several years ago, during a job interview for a Christian organization, my prospective employer asked me to tell him my “testimony.” The fact that I was a Christian apparently wasn’t enough. I had to have a good conversion story to go along with my faith.
Now you may have a great story about how “the hound of Heaven” chased you down and gnawed on your leg until you surrendered. No doubt your story would make for a gripping movie of the week on Lifetime and lead to the making of numerous converts (see #1). But the harsh truth is that as compelling, and even useful, as your story may be, it is not the most important story you could tell.
You are only a very, very minor character in the narrative; the starring role goes to the Divine Protagonist. In fact, he already has a pretty good story, so why not just tell that one instead?