Argentine Tango, on the other hand, is faster and snappier, and the figure 8 is pretty tiny. The hind foot is usually kept in tight, perhaps hooked around the ankle of the other foot for quick movement into the next step. To make up for the lack of lines, you use the movements of the hips (the snappy pivots) to make fast swirling movements of the dress. (In general, the footwork in Argentine Tango is more about flicks and kicks and snaps rather than lines--my impression, anyway.)
But with most dances, I agree that it's good to play with the lines and look at how they work with the clothing. Ballroom and Latin are all about showcasing the woman. The woman does all the flashy, sweeping moves; the man moves with her and leads and provides support. So we both work at making all the woman's moves as flowing and broad and sweeping as possible. Very pretty stuff, when done right.