Let's talk about font promo material (mainly digital for online selling, I saw the other thread about printed specmens). I know it really depends on the typeface and what features are intended to be shown. But how much time do you usually dedicate to this phase, do you reuse some template images from previous specimens, do you try to standardize the specimen for each typeface.
Do you have some special tricks. For example, websites that organize font bundles often ask for cover images that don't use simple solid color background (but some pattern or image preferably) because allegedly that increases sales.
Modern/juicy/fancy-designed type specimens played an important role in my interest in type design. So in some cases, I spent even two weeks or so carefully planning each image, to show the typeface in the context at various sizes, preferable usage, while trying to establish the "theme" or "tone" of the specimen. Sometimes I felt that I wasted my time, but on the other hand, it might draw the attention of some websites that offered different ways of partnership.