Yep, it is not easy to explain to your parents/wife/friends how you spend your days.
I re-stumbled upon an old post I read immediately after it was published.
(Clarification: ‘old’ means ’2 year old’, but nowadays that age is like a century :)

I was re-impressed by the graph used in that post, which represents the many sides of user experience design.

Now I realize why I am so tired when I go to bed. Because it’s like I am doing six jobs, which are:

• Information Architecture
• Human Computer Interaction
• Interaction design
• User Interface Design
• Human Factors Engineering
• Usability

Should revise my hourly rate :)