Hi Stephanie:
Good mixing it up for variety. If students sense concern for their success, honest and sincere interactions, and solid instruction, even the quikiest of personalities is probably going to be acceptable to the largest group of student.
Shmoozing that's in-sincere, being unprepared, or artificial just wo'nt cut it with most people. Even a knowledgeable teacher can't get by on "nice".
Regards, Barry