How do you know what is fun?

Hey All,

So, I have this problem where I don't know which class I enjoy most. It's weird, people seem to resinante with a certain class and play it 24/7. How do you do this? Idk what class fantasy I like, Idk what class I like, Idk what class I like the most. I love the game but can't decide on a class How do you determine your playstyle?