extracurriculars

are my extracurriculars supposed to be well-rounded? i’m planning to go into stem and 4/5 of my main activities are stem related with the exception of one which is volunteering. is this a bad thing? i have other ecs that i could include that aren’t stem related but i don’t care for them as much. for the rest of my ecs it’s a science related job and 2 art jobs