It doesn't really matter. GPT is good is you want to use Secure boot (Which unless you are using the Annivasary update of Windows 10, secure boot has a flaw that can be easily bypassed but i think you need physical access to the PC) or if you are using a drive bigger than 2TB. otherwise there is no advantage of GPT over MBR. GPT can sometime be a little bit more of a pain to repair a boot loader than MBR but there are programs that do it for you.