Data not exporting correctly into .csv from Powershell script

Though I can display all the data to the terminal; when it exports, the Hostname columns fills with
System.Object[]. I need to add to more columns, but in previous attemps thy also populated with
Example:
oUTPUT_eXAMPLE

Retrieve host information

$hosts = Get-VMHost

Initialize an empty array to store the data

$serviceTags = @()

Loop through each host

foreach ($hostsname in $hosts) 
 {
    **#Retrieve Datacenter, hostName and Model**
    $mydatacenter = Get-Datacenter -VMHost $hosts
    write-host "Completed Datacenter..."
    $vhostName = $hosts.Name
    write-host "Completed Hosts..."
    $model = $hosts.ExtensionData.Summary.Hardware.Model
    write-host "Completed Model..."   
    $serviceTag = ($hostsname| Get-View).Hardware.SystemInfo.OtherIdentifyingInfo |
        Where-Object { $_.IdentifierType.Key -eq "ServiceTag" } |
        Select-Object -ExpandProperty IdentifierValue
    write-host "Completed ServiceTag"

   # Create a custom object with Datacenter, host name Model and service tag

    $serviceTagInfo = [PSCustomObject]@{
       DataCenter = $mydatacenter
       HostName = $vhostName
       Model = $model
       ServiceTag = $serviceTag
       }

    # Add the object to the array
    $serviceTags += $serviceTagInfo

}
# Export the data to CSV
$serviceTags | Export-Csv -Path "c:\Users\myuser\Documents\ServiceTags2.csv" -NoTypeInformation

The line

$vhostName = $hosts.Name

works by expanding the Name field of the $hosts array into an array of strings of all the names. It's equivalent to

$vhostName = $hosts | foreach {$_.Name}

It's called member-access-enumeration.

Since $vhostName is an array it gets expanded to System.Object[] in your output. Since your already iterating through $hosts just use the current $hostname struct:

$vhostName = $hostname.Name