Being relaxed enough to enjoy it is in your favor as it can also be seen as confidence in one's abilities/self.

One of the interviews mentioned above I actually had to wear my hair under a cap for a job at a Lowe's Distribution Warehouse. The Ops Manager hired me after about an hour interview(5 different people) and told me to show back up in two days. I left without getting the exact time and went back the next day, forgetting my hat, and when he saw the long hair he asked if I was going to cut it off?
I told him as the hair wouldn't affect my performance and no danger of moving parts, at that time, I saw no need in wasting money. Then I asked him if he wanted me to get it cut so he could make a wig? He was bald and a big man looked like Mr. Clean. Me and him got along great the whole time I worked there!

Only thing I can say about the interview is to try and notice anything in the interviewer's office that might tip you off to their likes/hobbies(sports/art/books) outside the office. This might give you an advantage if you share a fondness for a mutual subject!

Regards,
Lobo-hotei
lobo

Treat the earth well, It was not given to you by your parents, It was loaned to you by your children.
Native American Proverb