There are a million ways to make your cake balls/pops uber cute. I haven't tried all of them, but the best thing I can suggest would be to do a search for them online. There are so many fancy ones out there, the ideas are endless.
I've only experimented with a few simple techniques, but they get the job done and look pretty sharp if I do say so myself!
I'm going to give you three examples, because that's all I remembered to take pics of.
The first is the chocolate swirl. This is a super easy, super cute way to dress up a cake ball a little bit. I always like to put SOME sort of effort into making them look good, and when I'm short on time, I pull out the bag. I fit the decorating bag with a small round tip, fill it with some of that melted chocolate (you can do chocolate on chocolate, or try swirling the vanilla on the chocolate or vice versa. there are also candy colors you can buy to change it up even more), and swirl it or criss cross it or whatever, onto your cake ball/pop. It does a ton for presentation and it takes two seconds.
The second technique is the edible marker. This one is also super quick and easy. After your ball is set up, just take and edible marker (you can get them at most craft stores in the cake decorating section) and draw what you want. These ones are softballs. I just took a red edible marker and tried my best! I think a pumpkin would be a really good use of the edible marker. Dye your vanilla almond bark (or buy orange candy melts) orange, add a snip of a green candy rope on top before the ball sets up for the stem, and draw on a cute jackolantern face with your black edible marker.
The last technique is a little more time consuming, and you have to go fast, because this stuff has to be done before the ball is set up. So after you dip the ball in your chocolate, swirl off the excess and when it doesn't look so drippy, sprinkle some sprinkles onto the bottom. If its too wet, the weight of the sprinkles will drag the chocolate down. Then flip the ball right side up and add some shaped sprinkles to the sides. This part you have to do really quickly because it hardens so fast. And there you go.
I would really recommend looking up some more ideas on
http://bakerella.com/. She does a lot with shaped cake balls. They're cute, but take a little more time.