Pictures: Most and least stressful jobs for 2011

Baltimore Sun photo by Lloyd Fox

Hours per day: 9.5 Income: $40,357 What CareerCast had to say: "Real estate agents are the intermediaries between buyers and sellers in real estate transactions. Agents work long, erratic hours including working most weekends, spending much of their time showing properties to clients. The field is highly competitive, which can cause high levels of stress."

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Baltimore Sun photo by Karl Merton Ferron

Hours per day: Varies Income: $30,168 What CareerCast had to say: "Emergency medical technicians (EMTs) are typically the first responders to emergency situations where medical care is needed. These technicians are often the lifeline for patients between the location of the accident and the hospital. The hours are long and often require 24-hour shifts."

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Job search website CareerCast.com came up with its 10 most and least stressful jobs for 2011, taking into account criteria including travel required, hiring outlook, growth potential, deadline pressure, competitiveness among employees and physical demands. Income and hours per day are provided by CareerCast. Talk about what jobs you think are the most or least stressful in the comments below.