Interaction Designer's Elevator Pitch

There's a very interesting discussion thread going on at IxDA forum, called "Interaction Designers: What is your elevator pitch?" I consider myself an Interaction or UX Designer who is evangelize UX to the designer and developer community. Although UX Design is a broader term than Interaction Design because it could be any aspect that affects the user experience of a product, these two terms are often used interchangeably in software design. In many social situations, I need to first give the elevator pitch of what is UX design. My answer has evolved over the years:

Q: What is Interaction Design or UX?

A: [when I first got into HCI field]: It's like a fashion design but for computer software.

A: [when I was in grad school]: It's a study of human behaviours when interacting with computer technology through user research, design, and usability evaluation.

A: [Now] I help people improve their user experiences with they technology they rely on everyday through designing useful, usable, and attractive software. I would like to design compelling User Experience that puts a smile on people's faces.

Here are my favourite elevator pitches from the discussion thread:

I design how digital products and humans interact with each other.
I plan and build online experiences for people by focusing on making things easy to use and enjoyable. I do that by listening to people and working to incorporate solutions to meet the needs of the people that will use it. I pretty much just love efficiency and optimizing things for others as best as I can.
I help spread the smile when dealing with products and the products could range from a simple website to physical products to entire systems.
"I'm an interaction designer"
"What's that?"
"I design how things should behave and then get ignored by everyone else."
"Oh, like what?"
"Like that your TV remote should have a dial, like a mouse wheel, for volume and channel changing. Because you can skip ahead much faster and count how many notches you've clicked. It could even depress so an on-screen number could rapidly change, and then pressing shoots off to that channel."
"That's a good idea, why aren't they like that?"
To General Public - "You've seen the TV ad for that Easy Button? I do that."
To IT Manager - "Making your 50,000 lines of code usable by Normal People"
To Marketing - "I'm the Competitive Edge."
To CIO - "What's the main difference between a conventional IT shop and a professional software development house? Me."
I design software and websites that people don't hate.