Hi Bonnie,
Sincerity is easy - we just have to be committed and be ourselves. Students somehow can tell, and I'd rather be an authentic version of me than an artificial version of anyone else. Students will give their trust and respect to someone they perceive is genuine. An I believe this trait can even overcome some relatively minor personality quirks. Afterall, truely, we can only be who we are when it's all said and done, eh?
Barry Westling