Games like Warhammer Quest and Blood Bowl frequently involve placing a model on its side to represent it being stunned or knocked down. If you're after a premium look and feel for your models, considering how the underside appears is a worthwhile investment.
I build and paint small plastic soldiers.
When not designing software, I'm usually working with miniatures, primarily from Citadel. I have 689 models, with 127 painted and 90 in progress, making my pile of shame 472. Each model takes 10.7 days on average and my overall completion is 25%.