I bought a bunch of the new Buffalo nickel P&D sets from the Mint. I opened a box up to see if maybe I had any error rolls, which I didn't. Now that I have this box open, I'am curious to open the rolls up to see if I have any error coins. Should I or shouldn't I, LOL?
I'd say that if you are interested in collecting error coins, then there is only one way to learn if you have anything that would be of interest to you. On the other hand, if you're hoping to cash in on the speculative nature of coin "investers", then you should leave them as-is and go heavy on the hype.