I don't like human space flight. Too much money, too little science and a great sense of tragedy when one or the other mission fails. With unmanned missions, you collect data, analyze, debug and start the next mission. With humans, there will be huge recriminations, self-doubt, all sorts of dirty linen will be manufactured, and copious amount of bad blood spilled. The Space Shuttle programs pushed back NASA by 50 years. Voyager programs, on the other hand, are still travelling in interstellar space and sending amazing amount of data about interstellar space. NASA/JPL's planetary programs have also produced far more science than the fabled Apollos.