Some recent additions to my collection are Slovenia 3 euro coins.
I was surprised to see these are actually circulating coins.
Sorry. But I need to correct you. These €3 coins are legal tender ONLY in Slovenia and not in the rest of the Euro zone. Morevover, they are NCLT. Just like the German €5 and €10 coins, and which are legal tender in Germany only.
But these €3 are really nice. I initially wanted to collect them. But, in the end, I did not. One has to draw a line somewhere. My resources for coin (and banknote) collecting have been limited for quite some time.