The difference between a good looking Power BI report and a great looking Power BI report is just a short extra mile using a custom background template. It is easy to create or download free custom backgrounds to make your Power BI reports pop!
Using basic best practices in material design, it is pretty easy to create a series of beautiful backgrounds for your reports to give them a professional look. If you are not a designer, you can download 10 free templates from my website as well.
Here is one basic report as created in the basic designer.
And here is one using a custom background.
Download 10 free templates from here or reach out of you need help!