On the remote chance that you hear no CQ's, go ahead and try one. Many a time I've heard a WN or KN station call CQ time after time and be answered by stations in other parts of the band with no QSO resulting. He just sits there like a lump, expecting a call on his own frequency. He has few QSO's and he creates beaucoup QRM with his useless calling. Contrary to your first impression a long call does not attract eager prospects.
People are a restless lot.
After waiting through ten or twelve CQ's the average operator will lose patience and start looking for someone else. Make your calls short. With a little thought you will realize that if the other station hasn't heard you in the first minute or less he's probably not going to hear you at all. CQ three times, sign your call three times, and repeat the whole thing three times. Personally, I punch out four CQ's, sign three times and repeat three.