I really would like to hop a train one day, but right now it seems pretty unrealistic. It'd be fun just traveling around north america and trying to avoid being caught. But really I think the difficulty of it would outweigh the fun. I mean, you would be dirty, and your limited to what you can carry for supplies. Supplying your basic needs would be hard too, money or stealing food, having a clean change of clothes, etc... Although I think one day if I didn't have to worry about taking care of rent and bills and all the other stuff of civilian life, plus having the funds to at least buy what you need when you need it at various stops along your journey. Then yeah, I think I'd be a fun adventure.