@jack - I am not sure why the cruise idea really does not appeal. Possibly because I like to turn right, or left, go behind, over and all over. The thought of getting off the boat to visit a town, and have to rush back to the boat again without having a 'proper' look around. Must say too that the recent accidents have put me off even more - and give me a sense of being 'trapped'. I always travel with DH or a friend/s - not on my own- although traveling on my own wouldn't scare me.
Personally I am much happier visiting a small area really well, and get to know locals and the 'behind' the show places, then doing a big hop from place to place. First time we went to the States, we took 3 weeks to 'do' north Arizona and southern Colorado - and we kept meeting people who were visiting the whole of the US in 10 days. Just can't see the point of that.
Funny, again. how were are all so different.