Your choice from train, bus, ferry or plane

If you had a free trip you could choose to travel from one city to another by a particular sort of transport which would it be: by train, by bus, by ferry or by plane? Why? If it is available I always choose to travel by train and I love it when I have a train pass. I used to get a weekend wonder ticket and travel extensively in Germany on the slower trains. When I was 18 years old I had an Inter Rail Pass. In Australia I bought individual trains like Cairns to Brisbane and Adelaide to Melbourne. If it is a long haul journey I put up with going by plane. I only take a ferry or a bus if a train is not available.