I don't think that anybody would use Hotmail if they knew the benefits of Yahoo Mail.
6 MB for free instead of 2MB with Hotmail, and 25 MB for $20 instead of 10 MB.
Plus, Yahoo's free spamguard software really does work... I turned it on about a week ago, and every unsolicted porn mail has been sent to the bulk mail folder, and not once has a message been sent to the bulk mail folder when it wasn't spam.
By the way, you can still access the porn mails, it's just good to have them out of your inbox when you're checking your mail at work