It's pretty simple - as with all things in life, it's chocolate and vanilla. What flavor ice cream do you like ?
All chocolate is is vanilla that someone screwed up by adding chocolate flavoring to. You're wasting half of your ice cream cone.
I have to admit saving die cracks when possible. I have a couple rolls saved from my 2009 Lincoln cent DDR searches. I save them, like you, because I think they're cool. Again, I feel like it's just a matter of money and marketing.