types of customers i have deal with

i have deal with all kind of customers but the ones i deal more often are customers in a hurry that requires fast and effective responses to get them satisfied and to avoid getting them angry or frustrated. another common customer if the intellectual that pretend to know all even if it is not on his field of work, these customer requires an effort to get them realize that the help required will need him to cooperate and perform tasks that he might think are worthless but are necessary.