My first thought was actually Moses. Used by God even though he was a murderer in a mighty way. Older adult when he launched out into the unknown. Told God that he wanted God to send someone else to talk to the Pharaoh because he couldn't. Short of temper. His following of God's will for his life took him places that he probably never conceived of, and once he was on his way, he was on his way...even when he had doubts. In some ways, I am so very much like him. And, the ultimate ones (of course, Jesus is the ultimate, but I want to not talk about the obvious, at least to me)....those who are in the genealogy of Jesus. Murderers. Prostitute. Liars. None of them really "belonged" in the genealogy of God as Man, but by golly, they are there! Just as I don't really belong in the "descendent" category of Christ my savior, but by golly, by His power and sacrifice, and the love of God Himself, I am. And, I figure if God can use all of these messed up people to His glory, He can do the same for me/with me.