There are so many, and none of them a bad looking tractor, that you could pick any and wind up with a pleasing picture. From brand shiny new on the dealer's lot to rusting away in the field where left, there's plenty of subject material. Some of my personal favorites: late 2U series Cat D8 with bulldozer and rear cable control; JD 3720; Oliver Super 55 and 550; any Farmall Cub, letter series, or hundred series; Ford 8N, NAA, 6xx, or 8xx; International wheatland W series; International TD crawlers; Minnie Mo G series; JD R, 80, 820, or 830; JD 440 crawler bulldozer or loader; AC HD 5, 9, 15, or 20, either bulldozer or loader; MF 1500 compact series; the list goes on and on. But you get the idea, you can't pick a bad 'un.