I just got back from a job interview during which that question was asked. These days I prattle on about wanting a challenge, a chance to grow, blah, blah, blah. The truth is I really don't have some kind of a grand plan. Nor do I have an ideal job.
How about you? Do you have an ideal job? Is it just in your head or are you living it? How do you answer the 10-year question in interviews? If it's something good, can I steal it from you?