Aerotek Engineering interview questions

I really do not understand their intent. They have my resume and I had been to their office once a year ago. I have an extensive technical background. We seem to to be playing cat and mouse. The first thing they say when they contact me is they have several opportunities available. Si the next obvious question is what these opportunities are. But the recruiter plays this game of asking me what I am looking for or what I want to do. So I tell him and then repeat asking what opportunities are available that he is referring to. Which he never tells me. Now I am thinking this guy is just trying to fill is quota of cold calls for the day, the week or the month without any real lead for the job seeker. I don't know what kind of culture Aerotek promotes in their organization but I get this type of call from them every time. I finally added their number on my phone so if I ever get a call from them again I will not answer. They are just wasting my time.