I'm creating a client content type. One of the properties I want to store for each client is their postcode.
I could create my own site column, say Client Postcode. But there's also a site column provided by SharePoint out-of-the-box, named ZIP/Postal code in the Core Contact and Calendar Columns section.
Is it better practice to always create my own site columns, or is it a good idea to try to reuse existing columns where applicable?