Currently I am using an email address from my ISP for my domain registration email. I would like to change this as I may be changing ISPs soon. Are there any problems associated with using an email from the registered domain as the contact email?
I would recommend that you have more than one mail address set up, for instance your primary own-domain e-mail plus your ISP e-mail or work e-mail. That way you’ll get the mails on your own domain but just in case there’s something wrong and it doesn’t work, you’lll also get a copy on an independent address.