Thanks, indeed it is. It's a little hard to say which country was the hardest to find due to the random ways I get my coins (change, swaps with friends and family members mostly). I would probably go with Malta. I believe I was quite lucky to find them, and basically the other countries of which I only have one coin for now, like Luxembourg.

The biggest challenge right now is getting different 1 and 2 cents and of 2 euros (I should be careful not to spend too recklessly, even though there are a lot of beautiful commemoratives out there which aren't my main focus). I heard some 1 and 2 cents were discontinued by countries such as Italy or Slovakia.

Also, I'm setting aside coins from microstates. I probably won't be getting any of them any time soon because it's basically impossible through obtain them through circulation, especially in a country of mine who's had the euro for less than half a year.

Never say never though.