Have you actually flown first class? I haven't, but I can tell you that even flying business class is a huge improvement over economy. Just getting on the plane is easier, with being able to use the priority lane for boarding, and sometimes even for security checks. Then there's the actual in-flight experience (more roomy and comfortable seat, more attention from the flight crew, drink what you want, etc...), but when things do go wrong the ground staff is actually happy to help you, and will do so even if there are a dozen economy class passengers that are clamoring for help.
Of course, it's way more expensive, but you get what you pay for.
Sure, some of the airline employees are hateful bastards, but I would be too if someone walked up to me and started yelling, so the "never become angry" applies regardless of what class you're flying.