Hi Aimee,
That's a good question. The chocolate wafers are easy to use, but they aren't always the highest quality chocolate.
You really can use any type of chocolate you like. You can use basic chocolate chips from the grocery store, even.
Some people like to get really nice gourmet chocolate bars and melt them down for making molded chocolates for special occasions.
It's really up to you. Choose a chocolate that you love the taste of and melt it using the methods described in the how to mold chocolate candy section.
If you are making them for a special event, you should consider tempering the chocolate for the best finish possible.
I usually don't go to that trouble unless I'm determined to have them turn out first class. They usually don't last that long around here to worry about, though!