Hobbyhorse used in a sentence

Hobbyhorse in a sentence as a noun

Uh oh. Afraid that quote is a hobbyhorse of mine.

For example, and this is my hobbyhorse, graphs/trees are stupid.

It's as if Somalia is such a favorite hobbyhorse of the corporatists that they can't actually talk about how great corporatism is without mentioning it.

I have a hobbyhorse about how the Internet has made criminal mischief so easy to accomplish that people do it without thinking; that the Internet & technology are short-circuiting our judgement.