Affiliate Marketing Secrets

I’m curious about how people go about finding a niche or a style for their photography. I’ve heard people say that they just photograph things they’re passionate about and over time a style develops. Is that how it works for you?
For myself, I don’t think I have a style or a niche. I’m not particularly worried about developing one or the other, I’m just a hobbyist. I shoot what I want and how I want to, sure, but there isn’t really any consistency with it. I’ve never had a moment where I said to myself (for example) “I want to be an automotive photographer!” While I might photograph a variety of things (generally objects, I find working with people tedious at best) I guess I’m just not passionate enough about any one genre of ‘thing’ to make that my niche.

I’m interested in building a hobbyist website (not a blog though) and hoping to create some residual income from affiliate advertising. I know some HTML.