In my opinion and experience, conservatives tend to be content and happy. Liberals aren’t happy unless they are agitating something: oh, you look too happy, let me mess that up, you are smiling too much, let me anger you, etc.
Nothing fun about being a “liberal.” I truly believe many of them are mentally ill and want to spread the misery.
The worst thing about our modern “liberals” is that they aren’t even liberal. They’re conservative to some kind of imaginary, quirky standards that aren’t even realistic.