For me, a designer is professional if he tells me "if you add one more thing in the menu, it won't work" or "remove that 'more' link after each paragraph" inste

For me, a designer is professional if he tells me "if you add one more thing in the menu, it won't work" or "remove that 'more' link after each paragraph" instead of "you should really use another tone of blue" or "I don't like the font you are using". I have no idea about programming, but I guess a professional in that field would be arguing about the software architecture, instead of what to use - php or ruby. So generally, professionals are people who help you achieve whatever goal you have, instead of arguing what tools to use.