Team America may have taken the proverbial out of his movies (need a montage anyone?), and Simon Pegg and Nick Frost paid homage in Hot Fuzz, but there's no denying Michael Bay has what it takes to make a successful movie. Every one of his movies since Bad Boys (1995) has taken over $100 million at the box office in spite of some scathing reviews. That includes Armageddon (1998), Pearl Harbor (2001), Bad Boys 2 (2003) and The Island (2005). His latest finds him taking on '80s robots sensations Transformers and he tells BBC Movies why he beat the death threats to make a blockbuster that raises the bar in terms of big screen spectacle.

Transformers fans gave you a really tough time when you were announced as director. How tough was that to take?

I cried [smiles]. What are you gonna do? They didn't know what I had in my head. But I think when the fans see it now they're like: "Wow!" But I took the death threats like a man. It was all over the internet, things like: "F**k you Michael Bay! Death to Michael Bay! You've wrecked my childhood!"

Is the current look of Transformers the way you imagined it?

Believe me, that's not what I imagined when I got the call from Steven Spielberg. I thought this was a silly toy movie. But he told me: "We don't have an idea other than it's a kid buying his first car."

Owning a car is a big thing for anyone going into adulthood, it's a big seminal moment, so I thought there was something in that. But then I hung up because I still thought of it as a silly toy movie. But then I made the trip to Hasbro and I've always been a fan of Japanese anime movies and I saw some animated shots and I thought if I could make this edgy, cool and real then it might be something.

What was the biggest challenge?

To make these robots as real as possible. I think we've made a huge accomplishment visually. When I was 15 I worked at LucasFilm as a kid filing artwork and stuff. But George Lucas wrote me a letter after Pearl Harbor saying: "You raised the benchmark on effects." I was like, "wow". But I think we did it again on this one. I think we've done things that couldn't be done about a year ago. It's very complicated lighting. To me, effects are all about lighting. We know in our minds when something looks fake and my key is to making the lighting as real as possible.

Is it true that you based the robots on different actors?

Yeah, we took Liam Neeson for Optimus - not his face but his mannerisms. We took Michael J Fox for Bumblebee and Hugo Weaving for Megatron.

Did you enjoy working with Steven Spielberg?

He's always been an idol of mine and he's been very complimentary to me. He says this thing that I don't buy - that I have the best eye in Hollywood. He says: "I steal stuff from you Michael!" But I steal stuff from him too. He was interesting to work with. He's different to work with than Jerry Bruckheimer because I can talk visually with him. But he's a real tight ass on money, which is good. We made this movie for half of what all those other movies this summer cost. Spider-Man 3 is $300 million and something, Pirates 3 is $350 million, but we made Transformers for $145m. And that's partly because Steven is very judicious on his movies.

If you think about Jurassic Park he only had 50 effects shots. On War of The Worlds he had 119. On this one, we had 450 but that's still not a lot. Steven makes you go in and think about what you're doing and that was a good exercise. But then there were times when he saw the movie and would say: "God, I wish you had that shot!" I'd have to tell him we couldn't afford it!

You have a reputation as being a hard director to work with. What do you say to that?

Listen, in my personal life I'm very mellow but in my work life we will joke around a bit, but I shoot very fast. My crew has been with me for 16 years and they know my style and speed. That's how we shot Transformers for $145 million instead of $300 million. We shoot 12-hour days, I don't grind crews down to 16 or 17 hours because you don't get as much done. But we do work hard. On my set I'm like the assistant director and his job is to push the crew... "let's go, let's shoot this!" I go into a mode and I'm very focused. But actors come back to work with me, so...

Do you read movie reviews?

I used to but not really that much anymore. They all hate me so I'm like, what can I do?

Where do you go from here? Will you keep making bigger and bigger movies or will you go back to smaller scale stuff?

Yeah, I've got these four movies I want to do that are just actors acting with really good dialogue and fun characters. It wasn't the right time after The Island to do something small. But I also like these types of movies. The problem is it's like doing three movies because it takes forever - drawings, conceptual... you spend months with a team of artists. And you always fight with the studio. But I always quit at the right time.

What about a Transformers sequel?

I haven't even thought about it. I know I've got some cool stuff that I was going to put in the first movie that proved too expensive. So who knows...

Transformers opens in UK cinemas on Friday 27th July 2007.