Translation of idiosyncrasy in German

I don't remember exactly what we did there, all I remember was that there was some show including a snake and a Janasene tourist agreed to have the snake on her neck. I almost fainted just by watching.
I understand that you use the article 'die' when talking about a feminine object, das when the subject is neutral, and der when talking about a masculine object. But how can you remember all these?
Many thanks for your letter. I am delighted to tell you that I have passed my exams and am looking forward to the next year. Meanwhile I am planning a trip to Costa Rica and some places around there.