I'll just be honest and say picking a joyful moment in Greece is like saying pick the most refreshing moment in an hour-long swim in the Aegean. The whole experience is refreshing.
So, I will narrow it today to my Greek exchanges.
First, I met a girl who's part of the writing workshop whose family is Greek, so she's been learning the language on her own for a while (she formally studied Ancient Greek). We spent a solid 10-15 minutes speaking only Greek (well, filling in English words when we lacked vocabulary), but we are perfectly matched in skill! That was great because we could converse without feeling lost or like we were slowing the other person down.
Then, throughout the day, I was speaking to Dimitri and Yianni in Greek whenever I knew how to say what I wanted to say. It was enough for even Dimitri to tell me my Greek has gotten much better (a surprise given that I haven't taken classes in six months, and I don't think I said anything that I couldn't have said last year. But I will accept the compliment!)
But the pinnacle was at the very end of the night when it was just six of us: me, Tassos, Karolin, Dimitris, Yiannis, and the new grill master (Grigoris, I think? He spoke German also and introduced himself, saying, "[Name], like Gregory Peck.") <-- he had to then explain that this is an actor.
The shocking thing is that, for the first time ever, I understood the conversation that was happening around me. For an entire summer last year, I sat at that table and listened and could only pick out words that offered no meaning when strung together, but this time I was able to follow (generally) what was happening. It helps that I was not the only native Greek speaker (Karolin learned when she married Tassos), but I felt more inside than outside, and it was awesome!
If only I could be fluent!! This is my dream.