Well, I have been a fan of your company and your products for a long time now. My family has used your products. I have your X, Y, and Z. I use your Z, A, and B and love them. I saw your company at a charity event and the guys that were at the event really seemed energetic and were all volunteering. I went home and did some research.

This is a great answer because it lets the interviewer know that this job opportunity didn't just fall in your lap, even if it did.