I find David Millar a more convincing poacher turned gamekeeper that most other former dopers, as well as a good commentator with the insight you'd expect. His remorse seems genuine, and not just because he got caught. Jonathan Vaughters, whose Slipstream/Garmin (now EF Pro) team Millar rode with after his ban expired, would be in the same category. A lot of others just mumble something unconvincing about being sorry, remain silent, or (like Armstrong) are pretty much unrepentant because 'everyone was doing it', and would presumably do the same again if they thought they could get away with it.