If you're dating a narcissist, you'll notice they he not only wants to be praised for every little thing he does, but expects as much. For example, he picks you up on time for your date; even though this act is a basic show of respect and courtesy, he expects you to tell him what a great boyfriend he is merely because he made it to your place on time. Or gives you a gift for your birthday and wants you to tell him what a great job he did picking out the perfect gift -- he doesn't care to hear about how much you love, or dislike, the gift itself, because even though it's your birthday and your gift, the whole situation is really about him.
Dreams of Grandeur
Narcissists fantasize about power, success and their own attractiveness and have no problem sharing their thoughts about these with you. He will tell you about how he pictures himself being a brain surgeon one day even though he dropped out college. Or how he will one day live in a mansion, own his own jet and have a chauffeur even though he now lives with three roommates and doesn't have any career prospects. If you're out at a bar, he'll point out all the girls that clearly want to hit on him even though they barely glanced at him when he walked in the door. He plans to be famous one day, but can't say for what exploits. In a nutshell, he's deluded.
A narcissist exaggerates his achievements or his talents. On your first date, he may list off all his incredible -- and not necessarily true -- accomplishments; e.g., he says he graduated from high school two years early, won a fellowship, has climbed Mount Everest and has an M.D. but is the CEO at his company, but in truth graduated high school, applied for a fellowship, dreamed about climbing a mountain, failed out of medical school and is merely the youngest employee -- not the CEO -- at his company. He also uses superlatives when talking about himself, such as "I'm the smartest man you'll ever meet" or "I'm the hardest-working employee at my job." (Reference 1)
Center of the Universe
As you date a narcissist, you will quickly realize the he thinks the universe revolves around him. He begins nearly all his sentences with "I." If you call him at work to ask a simple question, he gets upset, yet he'll call and text-message you while you're at work all day long just because he's bored. He worries about the way your appearance -- clothes, hair and makeup -- will reflect on him. He thinks he's so special that he shouldn't have to wait for a table at a restaurant.