Well, I'll tell you something -- the hobby horse is definitely somebody's hobby horse. See this amazing Wikipedia entry and you will fascinate your friends at parties and on fishing boats with hobby horse information for years to come. Hobby horse - Wikipedia
Here are just a few of the spellbinding facts you will be able to report. For example, you could say, "Yep, pardner, fishin's quite a hobby, by gum. Hey, that reminds me! Did you know ...."
A May-Day procession including a Teaser, a Fool, and a Hobby Horse that tries to capture women under its skirts features in the climactic scenes of the 1973 British cult-horror flick The Wicker Man.
From the term "hobby horse" came the expression "to ride one's hobby-horse", meaning "to follow a favourite pastime", and in turn, the modern sense of the term hobby.[63]
The term is also connected to the draisine, a forerunner of the bicycle, invented by Baron Karl von Drais. In 1818, a London coach-maker named Denis Johnson began producing an improved version, which was popularly known as the "hobby-horse".[64]
The artistic movement, Dada, is possibly named after a French child's word for hobby horse.[65]
The term is also nautical. A vessel that is pitching forward and backward into the sea harmonically is said to be hobby horsing.