I personally am letting my lil one open all but the exclusives. However - (you have made your decision, but someone else may have the same question as you
) what I feel it would really come down to when deciding for yourself are these questions:
Did you buy them because you want them? - if you want them, chances are you will keep them, meaning the next answer is probably a no
Do you intend to ever sell them? - No? Open them! Have a blast! Yes? Well, its 50/50 then, were you hoping to make a profit? maybe you shouldn't open them
Another thought that usually crosses my mind is "should i try to keep it so my kid(s) can sell them if something ever happens to me?" .. the answer is usually "I'd rather them keep them and enjoy them like I did" -- but still, same idea