In general, 21 percent of people refuse to tip a server if they receive poor service. But among those who consider music from the '80s to be "Oldies," 37 percent refuse to tip if they receive poor service.

Based on a survey of 123 people who consider music from the '80s to be "Oldies" and 488 people in general.

In general, 61 percent of people know how to drive stick-shift. But among those who have been in a fist fight, 76 percent know how to drive stick-shift.

Based on a survey of 156 people who have been in a fist fight and 473 people in general.

In general, 17 percent of people have written a fan letter to a celebrity. But among those who have bumper stickers on their vehicle, 34 percent have written a fan letter to a celebrity.

Based on a survey of 86 single people and 456 people in general.

In general, 65 percent of people think ambition influences success more than privilege. But among those who are allergic to pet dander, only 52 percent think ambition is the greater influencer of success.

Based on a survey of 112 people who are allergic to pet dander and 516 people in general.

In general, 30 percent of people have children. But among those who support the idea of single-sex public schools, 47 percent have children.

Based on a survey of 115 people who support the idea of single-sex public schools and 535 people in general.

In general, 36 percent of people use air freshener in their home. But among those who have less-than-excellent credit, 50 percent use air freshener in their home.

Based on a survey of 153 people who don't have excellent credit and 523 people in general.

In general, 64 percent of people like to use exclamation points. But among those who dislike Lady Gaga, only 52 percent like to use exclamation points.

Based on a survey of 294 people who dislike Lady Gaga and 534 people in general.

In general, 72 percent of people like guacamole. But among those with summer birthdays, 83 percent like guacamole.

Based on a survey of 184 people with summer birthdays and 564 people in general.

In general, 20 percent of people know how to Moonwalk. But among those who consider themselves blunt, 31 percent know how to Moonwalk.

Based on a survey of 178 people who consider themselves more blunt than tactful and 453 people in general.

In general, 53 percent of people have gotten a speeding ticket. But among those who are not registered organ donors, only 40 percent have gotten a speeding ticket.

Based on a survey of 155 people who aren't registered organ donors and 472 people in general.

In general, 43 percent of people prefer cold weather over hot. But among those who would rather have a maid than a personal chef, 55 percent prefer cold weather.

Based on a survey of 350 people who would rather have a maid than a personal chef and 511 people in general.

In general, 26 percent of people have tried to raise Sea-Monkeys. But among those who prefer pleated pants to flat-front pants, only 7 percent have tried to raise Sea-Monkeys.

Based on a survey of 100 people who prefer pleated pants to flat-front pants and 517 people in general.

In general, 21 percent of people dislike their nose. But among those who use the same password for pretty much everything, 34 percent dislike their nose.

Based on a survey of 224 people who use the same password for pretty much everything and 570 people in general.

In general, only 55 percent of people like Weird Al Yankovic. But among those who have been attacked by zombies, 75 percent like Weird Al.

Based on a survey of 78 people who report having been attacked by zombies and 560 people in general.

In general, 25 percent of people are bothered by the sight of blood. But among people who dislike their nose, 42 percent are bothered by the sight of blood.

Based on a survey of 120 people who dislike their nose and 561 people in general.

In general, 24 percent of people filter their tap water. But among those who think music videos are passé, only 15 percent filter their tap water.

Based on a survey of 201 people who think music videos are passé and 464 people in general.

In general, 48 percent of people can burp at will. But among those who can't tell the difference between Coke and Pepsi, only 30 percent can burp at will.

Based on a survey of 98 people who can't tell the difference between Coke and Pepsi and 495 people in general.

In general, 43 percent of people think Los Angelenos are cooler than New Yorkers. But among those who consider themselves faster-than-average readers, only 26 percent think Los Angelenos are cooler.

Based on a survey of 392 people who consider themselves faster-than-average readers and 568 people in general.

In general, 66 percent of people own iPods or iPads. But among those who prefer to shower in the evening, only 54 percent own iPods or iPads.

Based on a survey of 210 people who prefer to shower in the evening, rather than the morning, and 676 people in general.

In general 43 percent of people have older siblings. But among those who prefer Macs to PCs, only 28 percent have older siblings.

Based on a survey of 221 people who prefer Macs to PCs and 628 people in general.