350 Driver, I'll second that. There are four things that no one cares about - 1. What scores you got on your writtens; 2. Where you got your license; 3. If you ever busted a checkride; and 4. How you got your experience (but it has to be solid experience). Personally, when I'm looking to hire someone, the fact that the candidate has either held or holds a CFI certificate is a big plus for me. I don't really care how much they used it - the fact that they were able to successfully jump through all of the hoops is enough. (In fact, based of the theory that there's a big difference between 1000 hours of experience and one hour of experience repeated 1000 times, I tend to start discounting dual given after 1000 hours or so.)
It wasn't always so. I had an ATP and over 3,000 hours before I got my CFI. I thought that somehow I had "dodged a bullet" by being able to go directly into Part 135 (charter) flying after I got my commercial and instrument rating. I was wrong.
In any teaching situation, it's always the teacher who learns the most. The same thing applies doubly in aviation. Getting your CFI and actively instructing for a while will teach you things about flying that you will only learn through instructing. In my case, I ended up getting my CFI certificates so that I could keep my hand in flying while I went to school full time to finish up my degree. I learned a lot and to this day the lessons are very valuable and useful. Becoming a CFI, in my opinion, is one of the most important steps you can take in your aviation career. Just my personal opinion.
'Sled