What's your problem with using the published ones ??
They're not in the right place.
A specific example: EHRD has three standard VFR arrivals/departures: Hotel, Mike and Romeo. These are all well-defined, with various compulsory and non-compulsory reporting points, altitudes and such. They're also quite boring and not always convenient for where we want to go.
For a scenic flight we typically do what's informally/locally known as the "Waterweg arrival". It start at Hotel (a formal VRP), then follows the river to enter the CTR "West of Maassluis" (informal/local VRP). Continue to follow the river until the "Euromast" (informal/local VRP), then on to Papa (again a formal VRP).
Likewise, I generally depart "direct Oud-Beijerland", or "along the highway to the west of Zoetermeer".
We might also want to do an orbit "over de Kuip" (which is the Feijenoord soccer stadium) if we have soccer fans on board, or "over de Koopgoot" if we have women on board.
And so on and so forth.
It's not like we're inventing new VRPs literally next to published VRPs, or invent new names for existing VRPs just to set ourselves apart from non-local traffic. It's just that we want to do something, somewhere where there's no formal VRP defined. Through years of experience and habit, pilots and ATCOs develop an additional set of informal/local VRPs which are quite useful in these situations.