I personally think of Pandorum when I think about "slow" space travel. Though we are just as far from developing FTL as we are Cryogenics like those seen in the movies. That being said, I'd personally want to see these sorts of ships be accessible to all the people of the world after they've been tested to be safe and reasonable. I'd say the first ship should have the astronaut level requirements that we have today at the very least. Then the second ship to have people who are definitively healthy but not necessarily up to those standards for astronauts. Hopefully before we have generation ships going to other star systems we will develop gene therapy for conditions that would hinder people from embracing space travel and make general well being much better. That being said, I don't think people like myself will likely be able to join said ships if they were available today, considering my hearing issues and weight problems. However, none of this is prudent to explore until we have eradicated income inequality and create a system that benefits all people even if that means lowering the ceiling to raise the floor.