Doing something you love in business is the best thing to do because you will have passion for that particular business and be Doing it with all your heart and meeting your target won't be difficult.
Having passion in anything that you are doing which is business-related is always going to make it more easier for you to be engaging in that line of business. Even if you are having challenges, the passion that you have in that business is always going to propel you into not giving up but doing your very best to make sure that things start moving better for your business.