<p>I share many of the reasons for answering questions with the others given here - especially that of keeping sharp.  But I'll add an extra one that actually got me started on this site in the first place.  I'm not the world's greatest programmer, and found Stack Overflow to be a wonderful resource for answering my questions.  I felt it was right to "give something back" but obviously couldn't contribute over there.  Answering on CV "balances out" all the help I get on SO.</p>

<p>If you find CV is really helpful, perhaps consider given back on the SE site in your area of expertise?</p>
