I personally prefer web pages for their ease of use on different OS.

With regard to the gathering of parameters and display of results: most of the time I develop my applications as a library that can be used by CGI-Script and by CLI application.

That way I develop the functionality of the application with the command line client to speed up the development cycle.
Thereafter I write the CGI interface that just validates the input and calls the library functions.

As a side-effect I get a scriptable program to setup the application.