Over the years I have seen and read many different styles of PowerShell Scripts, and all users have written them to the best way they have learned how to write the script themselves. Don’t get me wrong here, I have gone back and re-read some of my first initial scripts and wondered what the &^%$ was I thinking. :)
Here is a great guide on the best practices and styles. Credit goes to Don Jones, Matt Penny, Carlos Perez, Joel Bennett, and the PowerShell Community.
https://github.com/PoshCode/PowerShellPracticeAndStyle
G.S.D. 