My first year on the market, I got 2 interviews, no offers. After each interview, I thanked the SCC, expressed my regrets that it didn't work out for me, and asked if they had any advice they could share in helping me for the future (via email). Both SCC asked me to call back if I wanted feedback, so I did.
Good advice. A few weeks back, I was flown in for an interview, which seemed to go like a dream. However, still did not get the position.
While very curious and anxious about the reasons for rejection, I did
not call to ask "why didn't you like me?". Instead, I called to ask if the SC chair could give me any tips for my future applications. To my surprise, she ended up answering the 'real' question (answer: I had done everything correctly that could have been done. However the research interests of the competition happened to fit into an intended team-research proposal better than mine did).