When I was young, and fresh, just came out from Uni, I would definately go for salary but as time grows, you gain more experiences in working and you are able to bargain and demand, the interest of you can begin to take a little portion of it, not more, because at that time you will have a lots of commitment. Hire Purchase, Housing Loan, PTPTN, Insurance Premium, Car Insurance Premium and etcetra.

As time goes by, and your graph is stagnant, can't increase another as you have obtained the maximum, you will look into your interest. You will have excess money ( provided you don't overspend and invest wrongly and other money losing activities), then you will use that money for your interest. Open a small prawn mee shop? Or a florist?

For my current stage, interest begins to take a little portion of it already.