7 Types of People Coffee Professionals Can't Stand

If you’ve worked in coffee long enough, you’ve met them: the customers who think they know better than you, the armchair experts who love to critique your technique, and the competitors who talk behind your back. These are the people who make the coffee industry just a little more exhausting every day.

Based on insights from Chinese coffee professionals, there are seven types of people who consistently frustrate those in the specialty coffee trade—from entitled customers to arrogant peers. Here’s who they are, what they do, and why they’re so frustrating.

The Know-It-All Customer

These are the patrons who barely know how to operate an espresso machine but still feel compelled to tell you how to pull a shot. They might claim to be “coffee enthusiasts” but often mix up basic terms like ‘extraction’ and ‘brew ratio.’ Their unsolicited advice can range from nitpicking your grind size to insisting they know the “right” way to tamp.

The 'Coffee Shops Are a Goldmine' Customer

This customer walks in assuming that running a coffee shop is akin to printing money. They act shocked when they hear how thin the margins really are, often citing outdated stereotypes that equate cafes with instant wealth. Despite the reality of rising rent, expensive equipment, and slim profit per cup, they cling to the myth that coffee shops are as profitable as banks.

The Backstabbing Peer

These are the baristas or shop owners who won’t criticize you to your face but love to gossip and spread negativity behind your back. Whether it’s badmouthing your roast profiles or spreading rumors about your business practices, their behavior undermines trust within the community and creates a toxic environment for everyone.

The Entitled Espresso Customer

This is the customer who orders a single shot of espresso, takes one sip, and then complains that “there’s nothing in the cup.” They often bring along a date or friend, order the most intense and smallest drink on the menu, and then express disappointment at the portion size. Despite espresso being a concentrated brew designed to be sipped in small quantities, they expect a full mug’s worth of liquid.

The Showboating Newbie Barista

Often young and eager, these baristas have just learned the basics and immediately start flaunting their knowledge. They might throw around jargon like ‘Maillard reaction’ or ‘bloom phase’ without fully understanding the concepts, or insist on using overly complex techniques that aren’t suited to the drink being made. Their overconfidence often leads to mistakes and annoys both customers and more experienced colleagues.

The Eccentric Industry Oddball

Every coffee scene has that one person who defies all norms—whether it’s behaving erratically in public, promoting bizarre brewing methods with no basis in science, or just being generally difficult to work with. These individuals are often referred to as 'weirdos' within the industry, and their unpredictable behavior makes collaboration and communication much harder.

The Kick-the-Door-In Competitor

These are the baristas or shop owners who visit other cafes just to challenge the staff, critique their techniques, or try to steal customers. Rather than supporting the broader coffee community, they treat other businesses as rivals to be undermined. Their behavior is less about improving the scene and more about boosting their own ego.

Frequently Asked Questions

Why do some customers think they know more than the barista?

Many customers pick up bits of coffee knowledge from social media or casual reading, leading them to overestimate their expertise. This is especially common with espresso, where terms like 'extraction' and 'grind size' get thrown around without full understanding. Their confidence often outweighs their actual experience, resulting in unsolicited advice or criticism.

Do coffee shops really make a lot of money?

No—most coffee shops operate on very thin margins. While the perception is that coffee shops are highly profitable, the reality is that costs like rent, labor, and equipment leave little room for significant profit per cup. Customers who assume coffee shops are 'as profitable as banks' are often misinformed.

Why do some baristas brag about their skills?

New or young baristas sometimes feel the need to prove themselves, especially if they’ve recently learned technical terms or techniques. Without much real-world experience, they may overuse jargon or insist on complex methods that aren’t practical, leading to frustration among more seasoned professionals.

What’s wrong with visiting other coffee shops to critique them?

While feedback is valuable, 'kicking the door in' refers to competitors who visit other cafes just to challenge staff or criticize their methods. This behavior is more about ego than improvement, and it creates unnecessary tension rather than fostering collaboration within the coffee community.

How should coffee professionals deal with difficult customers or peers?

Most professionals recommend staying professional and avoiding arguments. For problematic customers, polite clarification or redirection often works best. With difficult peers, maintaining boundaries and focusing on your own standards helps minimize conflict. In toxic situations, seeking support from other industry members can be valuable.

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