If you have a single focus, the one project or goal you are working on then I am a little envious. For some, one creative project isn’t enough. Some people operate a lot more effectively when working on a few projects at once and attempting to balance them as they go.
This has always been the case for me. Whilst working a day job, I was always making music and building a business. Part of the fun is finding the time to work and the most efficient way to use that time.
Jumping from project to project allows for a lot of creative connections to be made. When you are constantly being exposed to new ideas, new industries and working on your latest problem, sometimes the solutions seem almost serendipitous.
It isn’t all good. A singular focus is the best way to achieve the most in any given field. With so much competition, becoming the very best requires incredible dedication on a singular goal. When I think of a singular focus Kobe Bryant comes to mind. His will to do whatever it took to win is legendary. Countless hours of practice, playing through pain, personal issues and constant media attention meant nothing in the face of winning.
There is a lot to be said about playing to your strengths. If you enjoy drawing and are also very good at it and have no real interests outside of art then, by all means, focus on that one thing. But if you enjoy, say, writing, photography and business then a way to combine the three might be the way for you to progress. Separate projects, working with different people in different fields
A variety of projects and working with different people in different fields can only really be a positive thing creatively. Too many and you can burn out but there is a sweet spot to be found. Around five seems to be the agreed upon number by some experts.
In the end, all that matters is that you are doing whatever it is that you want to do. If you want to be the very best at anything, focus on that one thing and if you want a life with more variety that touches on a few of your passions then pursue that life.
Only you can decide how you want your life to be.