Hi Margaret:
I agree as well. There are few attributes as important that an instructor can possess than passion, enthusiasm, courtesy, respect, and knowledge.
When students feel good about their learning environment they're bound to do better in class and as graduate workforce employess. Some instructors are more natural in their delivery or presentation, but I believe anyone who is detremined to be the best instructor they can be can learn techniques that emulate these traits.
Regards, Barry