MeganJR welcome to the discussions.
Unfortunatlly there is a huge difference in MEDIA.
Here is a link that gives a breakdown of all the major brands and tells what the author considers the best.
http://www.digitalfaq.com/media/dvdmedia.htm
There are several different problems that raise there ugly head and some are hard to sort out, DRIVE(Optical) MEDIA, SOFTWARE, all of which can be the cause of problems.
I strongly suggest you use good media. the above link is a good guidr to use.
Good Luck Don