This is a minor nitpick, but technically when it comes to dedicated transports you have to paint up the infantry unit that bought the dedicated transport, they just aren't a permanent part of the dedicated transport. Apart from pilots and gunners for open-topped vehicles and the cling-ons from the Dark Eldar vehicles, as you already noted. =)
Yeah, but with a Ghost Ark you have to do it twice.
You have to paint the occupants in the transport model, as well as the actual models for the unit.
Armies Played (in order of acquisition)
Crons, SW, SM, Tau, 1k Sons, IG, Nids, BA, DE