Example of a New-<Whatever> Powershell function with default views.

New-Identity.ps1

Function New-Identity {

  <#
      .Synopsis
       Creates a new identity.

      .Description
       Creates a new identity with UID, Email, and UPN.

      .Parameter UID
       The new identity's UID.

      .Parameter Email
       The new identity's Email address.

      .Parameter UPN
       The new identity's UPN.

      .Notes
       The code in the region "Define Default Display Properties" was discovered at the addresses below and all credit belongs to the authors:
       * [Boe Prox](http://learn-powershell.net/2013/08/03/quick-hits-set-the-default-property-display-in-powershell-on-custom-objects/)
       * [Rakhesh Sasidharan](http://rakhesh.com/powershell/naming-powershell-custom-objects-and-setting-their-default-display-properties/)
  #>

  param(
    [Parameter(Mandatory=$true,
               HelpMessage="Enter the UID of the identity you're trying to create.")]
    [int32]$UID,
    [ValidatePattern("^\S+@\S+\.\S+")]
    [Parameter(Mandatory=$true,
               HelpMessage="Enter the valid Email of the identity you're trying to create.")]
    [string]$Email,
    [Parameter(Mandatory=$true,
               HelpMessage="Enter the UPN of the identity you're trying to create.")]
    [string]$UPN
  )

  #region    Define Default Display Properties
    # Create the list of property names that will be in the default display set.
    $DefaultProperties = "UPN","Email","UID"
    # Use the list of property names to create the Default Property Display Set.
    $DefaultDisplay = New-Object System.Management.Automation.PSPropertySet("DefaultDisplayPropertySet",[string[]]$DefaultProperties)
    $PSStandardMembers = [System.Management.Automation.PSMemberInfo[]]@($DefaultDisplay)
  #endregion Define Default Display Properties

  # Create the hash of the specified values for the Identity object.
  $Properties = @{
    "UID"   = $UID;
    "UPN"   = $UPN;
    "Email" = $Email
  }
  
  # Create the Identity with the parameters passed when the function is called.
  $Identity = New-Object -TypeName PSCustomObject -Property $Properties
  
  # Add the default display set to the identity.
  Add-Member -MemberType MemberSet -Name PSStandardMembers -Value $PSStandardMembers -InputObject $Identity
  
  # Return the new identity to the pipeline.
  Return $Identity
}

It's in the Notes section of the help, but it bears repeating:

The code in the region "Define Default Display Properties" was discovered at the addresses below and all credit belongs to the authors, Boe Prox and Rakhesh Sasidharan. As with most things, I didn't get here on my own.

Note: This is not the optimal solution. In a real system, you'd want much better data validation. This script is just as an example of a function with minor validation and a configured default property display set.