I love train travel. It's kind of slow because of all the stops but:
1) it causes the least motion sickness of any form of travel (my experience anyway).
2) It has the most comfortable seats; they actually recline to a useful angle and are way wider than bus or plane so you're not having to be ulltra friendly with the guy next to you.
3) There is food available on the train which tastes like food.
4) The bathrooms on the train are less scary than plane or bus bathrooms.