Long but insightful post, as they say you can never have a second chance to make a first impression.

Imagine you have a new colleague at work and your impression of that person is not very favorable. A few weeks later, you meet your colleague at a party and you realize he is actually a very nice guy. Although you know your first impression was wrong, your gut response to your new colleague will be influenced by your new experience only in contexts that are similar to the party. However, your first impression will still dominate in all other contexts.