What do you do in your spare time?

Answer 1

If you are asked that question in an interview ask yourself "What kind of answer is somewhat truthful and will also improve my chances of getting the job?" Then tell them with aplomb.

bask in my knowledge and eat cheese puffs

I answer questions on WikiAnswers.

Answer 2

If the employer asks

try to build it around your job.

When I am asked this question, I state family time, a nice dinner out once in a while and conducting research on the internet (as it relates to my job.)

In my case: I review the newest state statutes, seek alternatives to standard repair materials, look for ways to make my staff's jobs easier, quicker , safer.