Sometimes the right amount of eye contact can make me feel so bashful. I think the right amount is 3-4 seconds. It shows that the guy is confident. Seriously, if he is too hot it makes it hard to look at him from afar. This is a question that differs depending on circumstance and the people involved.
I usually have a problem with eye contact, I don't know why, but when I do use eye contact, it's pretty bold and at least a second. I usually look like I'm up to no good, haha, and my eyes get a bit wider so I don't look so depressed.
I make eye contact, but I'm to shy to smile. Cause I don't know what to do...lol