Here in Sweden several TV channels are airing this kind of programs with top 10 lists too. One interesting if rather annoying tendency I've noticed is that they're all nationally biased: American programs tends to promote American vehicles (appr. half of the list entries regardless of category and usually American as No 1), British programs prefers British vehicles (but have an interesting tendency to also hold German vehicles in high esteem! e.g. Leopard 2 as the No 1 tank) and so on. A fine example would be Supermarine Spitfire vs. North American P-51 Mustang; British programs invariably ranks the Spitfire higher than the Mustang, and Americans does it the other way round. Thank God I'm a Swede...