Baldur's Gate.
Why?
1. "Baldur's Gate" was my first game I bought.
2. That was first cRPG I played.
3. I played first BG more times than any game (I completed main story dozens times)
4. Well, just my favorite series

5. This is only one series that at the end of it I… cried because it's the end

I was around 13 years old