No matter what kind of activities your ECs are, someone will criticize that choice from a college admission context:
- Focused on your intended college major: too unilateral or one dimensional.
- Not focused on your intended college major: does not tell a consistent story with your intended college major.
- Varied: too scattered and incoherent to tell a good story of any kind.
But also, for the more selective colleges where ECs become more important to differentiate between applicants with top-end GPA in hard courses and top-end test scores, achievement and commitment in an EC is what makes it stand out from the “background” level of ECs.