Walking down the street, be arrogant. At an interview, be confident. In a relationship, be confident. Dating, be arrogant.
A socially successful person should always struggle between finding the happy medium between confidence and arrogance. People want to associate with other people that are comfortable in their own skin. Nothing is worse than someone who puts himself down or never takes risks. It is more attractive to me to have a mediocre looking person with the personality and confidence, than to have to constantly reaffirm the beauty of a great-looking, self-hating basket case. Internally, you have to exude a sense of confidence, for that is what going to attract a potential mate or friend.
But when does confidence become arrogance and when is arrogance acceptable? To me, casual encounters require sincere arrogance. I am talking off the wall, get out of my way, you bother me, I am so much better than you, etc. That mentality manifests in the way you walk, the way you talk, the way your face sits, the way your brow furls, and for some reason it suits you like a great, new, real tan. Especially, for the everyday casual encounters, there is never enough arrogance to go around. Throw it across the street by peering into a someone attractive's eyes, or jab it at someone walking past you by looking down your knows at them but in a flirtatious way. People subconsciously eat that up and subconsciously want more. They will react, it's funny almost.
Then you have to reel it in when things get a little more intimate. Exude the arrogance that your plans are never dependent on others, but the confidence to let someone else take the lead sometimes. The arrogance to start a new conversation topic, but the confidence to allow other people to speak. The confidence to leave a party early without saying goodbye, but the arrogance to know that you will be missed.
It also comes in different species. For example, in a relationship and dealing with someone's checkered past or ugly ex's. You need to have the confidence that you yourself have not had the cleanest record and should only judge in the way you would want to be judged yourself. But at what point does that mentality become this blind arrogance that harbors your common sense and separates it from this ilusory promise to the world that "it's different with me".
It is a tough battle, and though the Deputy never dates, he constantly struggles with balance. The bottom line is that everyone should be a little arrogant, but just a little.