The thing that makes it most important is going to be individual for you. What the “best” option is will be the one that keeps you satisfied, even through the bad, because you’re doing what you love.
What population do you enjoy working with?
Do you want to do PCP work, surgery, radiology, phlebotomy, emergency care...etc.?
I wish I had a better answer. But I know if you follow your heart and do what leaves you feeling fulfilled in life, that’s the best choice you can make for yourself. Think about where you see yourself in ten years. Try to volunteer or intern in various medical settings. Most importantly, don’t rush to decide what’s ‘best’ right away; only time and experience will tell!
Good luck in all you do!