When you break down the individual components of Fastlane's personality he doesn't come off sounding very good. He's a totally immature, reckless, thrill-seeking, show off. Surprising then to find that he's quite well liked by both humans and Autobots. The fact is there's just no malice in Fastlane's antics, he's mischievous at worst and his stunts are usually quite entertaining to watch. His most daring stunts can be a bit dangerous to others who happen to be nearby (he once caused a HUGE accident on Cybertron by doing a 360 in confining heavy traffic at 500 miles per hour) but no one's ever been really hurt by them except for Fastlane himself when he pushes his design just a little too far.
Fastlane is the younger clone brother of Cloudraker.
His alt-mode is a Cybertronian Dragster.