Do you lean more towards developing interfaces or the server-side of the application?

The choice between developing interfaces and the server-side depends on personal preferences and skills.

Frontend development focuses on creating user-friendly and attractive interfaces, working with HTML, CSS, JavaScript, and frameworks (React, Vue, Angular). In the PHP context, this may involve creating templates, integrating with the frontend, and ensuring good UX.

The backend is responsible for application logic, working with databases, APIs, and security. In PHP, this includes writing business logic, processing requests, interacting with databases, and integrating with external services.

For example, if you enjoy working with user experience and visual aspects, you should lean towards interfaces. If you're interested in logic, architecture, and data, then the backend is the way to go.