I think it is about up to you, what to choose. I select for myself PIXEL ART. but, i do simple in 8 bit style. You know. Cause i am a programmer, and simple pixel art is goes good to me. It is perfect. So you need to find your own perfect decision, if it is existing, of course. And, if you are more painter, maybe that it is OK, that you try to get skills in different art styles. So maybe for you answer is BOTH! And one is more trained, but another is OK trained!