Empathy in humans came about because it encourages cooperative group behaviour, as such the ability to understand those in your group and what motivates them is an asset, a group of a dozen is more likely to survive then a single man in a harsh winter, people without empathy tended to die off because they couldn't function inside a group without acting like, what we'd call today, assholes, putting themselves first, stealing, etc.
Aspergers Syndrome on the other hand, depending on the severity of your condition, isn't a lack of empathy (that is the ability to see the impact of actions on another as if it was happening to you), it mealy makes it harder to understand the emotions of others through non-verbal cues, it doesn't make you evil, it just means you have to work harder to understand things that other people take for granted, unless you have the most extreme version of the condition, it can be moderated with effort, I worked with a man with a moderate version of the condition for several years, at first it was hard to understand some of the things he did, but with effort on both our parts we became good friends.
Just don't get a job dealing with customer service and you'll be fine. Hell I'd recommend that to everyone, customer service sucks.