Have a balance of what you need for your dream job and what you enjoy.
For example I'm choosing Music, Performing Arts and ICT. I chose ICT because it is required to become a radio presenter. Performing Arts can also be useful for my future job because the radio industry likes people who can work well in different situations. I also really love acting. While with Music I'm really passionate about singing and enjoy doing it.
I'm choosing A Levels as well and it is a huge decision. Good luck and remember that balance is the key to success.