How important are first impressions to you?

It is very important to me. The first impressions are maintained for a long time. For example, when I met a boy after a few chatting, all of the decisions will be done at that time. If the first impressions are not good to me, I will not have a good time with him and I will never meet him again. I see all of the parts when I meet someone at the first time. I see a person\'s habbits like laughing habbits, talking habbits, eating habbits. I dont like a boy who hide his mouth when he laughs. If the boy I met laughs hiding his mouth, the attractions drops.... Like these situations, the first impression is important to me.