You should love what you do because you enjoy it. Life is tough, and we do what we can to survive, and sometimes we turn our hobbies into our work. For some of us, it works. But in time, we forget or loose that flare, that spark that made you love it in the first place, because you have bills to pay. Some artists forget to work for themselves sometimes, they spend to much time working for others, making their ideas happen so they can eat, but never find the time to make their own ideas happen.

And then there are those who get too worried about appealing to everyone that they do things they dont enjoy, just so they can make "More" Dont try to be like everybody else, because if we were all the same, then it would be dull.
Its Art, its Supposed to be fun, and Inspirational. You have to be inspired to draw. If you only do it to make money, then eventually, you will burn out, and stop doing it.