Choosing a niche you won't resent

Test one: repeat-purchase logic

Ask whether the niche gives you a reason to make new content every single month without repeating yourself. 'Cats' is broad enough to sustain a year of variety — seasonal cats, cats in jobs, cats in moods. 'Black cats only' sounds charming in September but will feel thin by February. Test a niche by listing twelve month-by-month angles right now; if you stall before month six, it's too narrow.

Also check the flip side: a niche that's too broad gives members nothing to identify with. 'Cute animals' could be anyone's club. The niche needs to be specific enough that a member could describe your club to a friend in one sentence and have it sound like nobody else's.

Test two: photographability

Subscription boxes grow largely through unboxing photos and social shares, so ask whether your niche produces a sheet that looks good spread out on a desk in a phone photo. Bold colour, a clear hero piece, and a satisfying 'full sheet' shot all matter more than intricate detail that only reads up close.

Look at what other creators in adjacent niches post and count how many of their posts are member-generated versus their own. If members rarely photograph a similar niche's mail, that's a warning sign that the visual payoff isn't strong enough to carry word-of-mouth growth for you either.

• List twelve month-by-month angles before committing to a niche
• Reject a niche if you stall before month six of ideas
• Check whether the sheet photographs well laid out on a desk
• See if similar niches generate real member photos, not just brand posts

Test three: how it feels in month nine

This is the test people skip. Picture yourself designing this theme for the ninth month running, tired, behind on laundry, with a print deadline in two days. If the idea of one more sheet of it makes you groan, that resentment will show up in the work and eventually in your renewal rate. Pick a niche broad and personally interesting enough that you'd still enjoy sketching in it a year from now.

A useful shortcut: choose the niche you'd keep making even if the club didn't exist. If you already doodle botanical line art for fun, that's a stronger foundation than a trend you researched because it looked profitable but leaves you cold.