Do you know anyone who stutters?

What was your first impression of them? Was the stutter immediately apparent? Did you think it was a temporary issue, nervousness perhaps, or did you immediately recognize it as a persistent disorder? How you deal with talking to that person? Is it nerve-wracking, tedious; does it make you impatient? Is it difficult to follow what they're saying? Does this person have low self-esteem? I stutter myself and I would just like to know how people perceive stutterers.