Lately my best style is 'Orchestral Music'. Assuming that's a style at all...well, it's at least a palette...
That is an interesting observation, even if you were slightly jesting: writing scores, based on orchestral instruments, can result in any style of music, in a sense. But one suspects you are referring to the John Williams "style" of orchestral music. So yeah, I'd call that a style.
Listen to a pop tune, say, one by an artist you don't care about at all where everything seems formulaic and easy-peasy. Maybe it's someone like Katy Perry or Beyonce.
Then try to write an original in that style, record it, and put it together yourself. Use as many tricks, loops and autotunes as you like. Now compare yours to the actual hit. I've had to do stuff like this for ads. It was very, very difficult.
Interesting anecdote about one of my favorite artists (musically, at least): Steven Wilson. He's had Guthrie Govan and Marco Minnemann on his albums and in his solo touring band. xref: The Aristrocrats.
He is probably most famous for his Prog Rock sound of Porcupine Tree and his solo work, though some of his solo stuff has shown "themes of influences" on purpose - his first was inspired by 1980s new wave alt rock, his second a bit more jazz inspired, etc. And he has a bunch of side-projects for other sounds. One of his solo albums, To The Bone, has some pop-influenced elements (as well as prog rock, because as much as he wants to, he can't totally escape it).
One of the songs on that album is called "Permanating". It is a full up homage to Abba and other disco-pop sounds. And he said it was one of the most difficult songs to write.
From Innerviews with Anil Prasad:
Anil: Many musicians have said it’s much harder to write a concise, effective pop song than it is to create a lengthy epic. What’s your perspective?
SW: I can only echo that. It’s a cliché because it’s true. It’s so hard to write a good pop song. Some people have said to me “Why did it take you so long for your Abba pop fixations to emerge in your music?” For many years, I’ve been very clear I grew up in a house where the conceptual rock music of Pink Floyd was just as important as the pop of Abba, The Carpenters and The Bee Gees. I never saw any distinction between those artists until much later in life when I realized other people did. I’ve tried over the years to write convincing pop music, but it’s hard and it’s not something that comes as naturally to me as the more melancholic, conceptual side. I don’t know why that is. I would say “Permanating” is the first true piece of pure pop I’ve released. That’s a testament to how hard it is to pull something like that off.