Wide range of foliage shapes and sizes. long-lasting
Most dragon plants will be Dracaena, some well-known ones would be, fragrans probably the easiest to grow, marginata a very popular narrow leaf type, sanderiana often sold as lucky bamboo.

Habit
A wide range of shapes and sizes.
Slow growing, they can grow quite tall but can be trimmed into shape.
Temperature
They are very adaptable, happy at room temperature but will also survive lower temperatures.
Watering
In warm conditions, especially through the summer water often but allow them to dry out between each watering. In a cool room and during the winter you can allow the compost to dry out for long periods before watering.
Nearly all dracaena like to be root bound and only need repotting when the pot is full of roots and only into a slightly bigger pot.
Positon
Happy in light shade, direct sun will tend to burn the leaves.
In a draughty or very dry atmosphere, the edge of the leaves can go brown.
Very tough, they make great specimen plants.
Very few bad habits, not happy in full sun, they can be expensive to buy.