Interaction design is a creole of coding and scripting languages, designs elements, words and customs. Helping users find their way to what you hope they’re looking for is very much and art and a science. Design for interaction can be unwieldy, and getting icons to line-up consistently in all the browsers, or making apps work across platforms and screen resolution is a chore, but I love the details of the work, often sorted out late at night working towards a go-live deadline.