I prefer to think of it as experience building. Sometimes I fly a burger run, sometimes circuits, and occasionally, a long trip. I will particularly fly circuits if I have just done a landing which disappointed me. Expanding all of your skills is the key. If you think to yourself that you're just doing [whatever it is] again, some more thought about diversifying may be appropriate. That includes types. I agree that having an airplane at your disposal is pretty important, But paying to operate one airplane should not be to the extend that it prevents you getting some experience on other types too - that is a merit of renting. Or, having a smaller share in each of more than one airplane.