What is a career in CS like?

[u/foreversingle-]

Im going into uni next year and choosing between CS and mechatronics engineering. The point of this post is not to see what the job market/employability is, but rather to gauge my interest in this field.

What sort of work do you guys do? What would I do outside of uni curriculum? I heard a lot about building personal projects, but what does that entail? Creating an app as a hobby for example? What are some career/job options and what sort of work do you do in said job? Whether you're a student or grad, whats your daily life looking like?

[u/ImpactSignificant440]

Like a career as a hollywood actor. Amazing, but you won't get one.