Lucky me, I suggest you pick a couple of the coins you are most confident about and send them to NGC or PCGS for certification.
For coins that are potentially worth many thousands of dollars, it is a risk of only $100 or so, and then you can see if the professional graders agree with you or not. If you are continuing to be an active collector, this is a reasonable investment to inform your judgement.
The opinions being given here are by collectors, some of them also professional delaers, with many years of experience, who are operating based on your photographs and their experience.
The TPGs have other tools they can deploy with the objects in hand.
Good luck!