All these answers are legimate and motivating. All good reasons to be in sales.
Personally, I got into sales as a young man 30+ years ago strictly for the opportunity to make an unlimited income. I wanted the money, I didn't care about my customers needs and wants. I played sports in high school and college and I approached my sales career as a 'game' and I formed 'game plans' to win as many sales games as I could...and it worked. I was a meticulous planner and worked hard to discover my competition's weaknesses, and formed my game plan to take advantage of these openings. I played the game with no mercy. I crushed my opponents and did everything I could to make sales for the money.
I was a ruthless, but successful, salesperson and always worked my way to top sales in my company. Then I would move to another company in another field for a new challenge and 'play the game' again. I was so competitive I would do whatever it took to win.
When I got older the 'game' changed for me. Thankfully, I changed. I began to shift my knowledge and talents from 'winning the game of sales' to 'respecting my opponent (competiton) and forming 'partnerships' with them so we could build each other's business. I respected my customers and used all my knowledge and skills to help them get the best product/service for them. I quit thinking about the money.
To my surprise, instead of playing to win a game to earn money, when I concentrating on making my competitor's and customer's lives easier or better with my products/services and advice, becoming their 'trusted advisor,' and making sure they were happy, my income increased substantially and my work became much easier and less stressful. My self-respect grew and my heart softened.
My point is, don't concentrate on making the sale to earn dollars. Concentrate all your knowledge and skills and use your heart to help others and the money will automatically flow to you. The more value you contribute to the world, the more money comes you way. The more good you do, the more money comes to you to do more good. Your reputation will grow and you will have all the sales business you could ever want.
It's not about YOU, it's about THEM...As a salesperson you have an opportunity to help many more people than most ever get the chance to do, and your rewards will be great.
Sales is the greatest profession on earth...