For me it was a gradual process. I had been taken to the opera from quite a young age, but it didn't become a passion until I reached my late teens. My father bought a recording of Cavalleria Rusticana (the Varviso recording with Souliotis) which I nearly wore out. We also had the score and I would play the overture and intermezzo on the piano.
I remember, though, a particular night when everything clicked. By this time I was a student at the university in Newcastle-upon-Tyne. Glyndebourne Touring Opera were visiting and I tried to get tickets for La Bohème, but it was completely sold out. I didn't know the opera at all, nor did I know anyone else who wanted to go to an opera, so I decided to go down and queue for returns one night. It wasn't looking very hopeful until someone came out and told the queue that there was a box available, so I and others in the queue agreed to share. That night I was totally transported. It was a traditional production with a totally believable young cast (I can't remember the whole cast but Mimi was LInda Esther Gray, who would have been in her early twenties then). I think I started crying in the first act and hardly stopped until the end. From that day on I would see every touring company that came to Newcastle and try and see every opera they brought. This way I got to see a wide range of repertoire, taking in Italian, French, German, Russian and British repertoire, from the Baroque to contemporary.
At about the same time I discovered the voice of Maria Callas and I started collecting all her recordings, most of which had unaccountably been deleted at that time, EMI presumably thinking that they had been superseded by stereo versions. (How wrong they were!). Although I have come to appreciate and love other singers, none has had the effect on me that Callas had, and she remains my touchstone for most of the roles she sang.