I also did an Ozzy piece for him, and so I got hired. Everything happened really fast. I can't give people advice, because everything in my life changed completely in less than a year and it's still not something I am used to.
To me, every interview, even if you love the artist, needs to be somewhat adversarial. Which doesn't mean you need to attack the person, but you do need to look at it like you're trying to get information that has not been written about before.
At a magazine, everything you do is edited by a bunch of people, by committee, and a lot of them are, were, or think of themselves as writers. Part of that is because magazines worry about their voice.
I was fortunate that I was at newspapers for eight years, where I wrote at least five or six stories every week. You get used to interviewing lots of different people about a lot of different things. And they aren't things you know about until you do the story.