As a lawyer, what do you like/hate the most about being a lawyer Do you think the 3-year training in

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As a lawyer, what do you like/hate the most about being a lawyer Do you think the 3-year training in law was worth the cost and time? What are some of the most sought-after specialties in law (ex corporate law, patent law, etc) and how do you specialize (ie do you need any special certificate, training, etc)? How difficult is it to become a prosecutor or a judge?