An excellent caricature deserves more than to stand in a void. It needs to be engaged in an environment that is both sensible and beautiful. If humor is the intent, the background should convey it with appropriate objects and places.
Granted, a caricature avatar usually stands on its own, but its use is for a website environment. But let’s say you want a groomsmen caricature with 8 subjects, each subject doing something that is unique to him, then they ought to be depicted in a place recognizable to them all…a ball field, a favorite bar or golf course, perhaps even the college they all might have attended.
In addition, each subject might have interesting hobbies that could be worked into the poses. A chef might be cooking at a grill while the fisherman catches the dinner.
I have made caricature backgrounds and objects my specialty for any type of caricature. Consider a caricature background when ordering. It’s an important part of a good caricature.