I too go through my change and save it. A couple of weeks ago I found a pre '65 Silver quarter in my change! That's very rare these days, but it does happen.
My change disposition is as follows:
Copper pennies and nickels are saved.
Zinc pennies go into a piggy bank for the grands.
Clad dimes and quarters are spent. I save them as my gun show "mad money." I use them to buy oddball ammunition that I don't reload, small firearms components and perhaps special reloading dies. Most gun shows have vendors selling Silver and Gold, so sometimes I'm able to turn the clad coins into real money. A couple of shows back I found a man selling Morgan and Peace Dollars, so I unloaded the clad coins and added a bit of paper currency to walk away with ten silver dollars at a good price.
As I've explained in the past, Silver Dollars seem to have almost magical properties. I have used them many times to close a deal to my advantage. Let's say that I'm negotiating over the price of an item that's worth roughly $1000. It doesn't really matter what the item is for the purposes of this explanation, but let's say it's a gun at a gun show.
The seller is dreaming and trying to get $1200 for it. We go through a couple of rounds of negotiations - which will probably include me walking away from his table once or twice - and I offer $800. Maybe he comes down to a thousand and the gun is certainly worth that, but I want the best possible price I can get. I up my offer to $900 and while I can see he's getting more interested, he's stuck on $1000. OK...now I walk away again.
Then I'll come back in five or ten minutes and say,"Look, I can go $900 AND throw in a genuine US silver dollar!" With that, I pull the silver dollar out of my pocket and let it ring on his table. Easily more than 50% of the time that'll close the deal for me.
Understand that currently, circulated, common date silver dollars are worth around $30 (and I presently never pay more for them), so what I did was use a $30 coin to get myself an additional $100 discount on a deal. Believe me, this works more often than you might believe.
So yes, Doc1 saves his change, but then he separates it and uses the different types of change for different things.
Best
Doc