Which to chose, internal media drive or external media drive?

When I’m talking about media drive, of course I'm talking about the burner and not the regular drive that just play Medias. No one just buy those anymore for the computer, if they want that they can just buy a portable one or one for their TV. There are Pro and Con for both but to break down in general it come down to costs and functions/abilities (write speed).

Internal media drive

• They cost less than their counterpart for external media drive
• They have more "write speed" then their counter-part of the same cost if compare with price alone
• Majority of Internal media drive are design for desktop computer
• You must know how to install the drive yourself, plus that drive must have the "right" wire/connector for the motherboard and power supply for your computer.

External media drive

• They cost more than the internal media drive
• They have less "write speed" compare to their counterpart
• depending when it was made and who made it, the size vary 
• most are just plug and play and get  most of their power from the computer that way, while other require more power which require you to plug into an electrical outlet.

I just telling you the pro and con for these, the final choice it up to the person who buying it and using it. I mean these are some of the stuff I have to think about when I bought one or two.