An optimist differ form a pessimist in his joyous and happiness. Its easier to live as an optimist because optimist always trying to see only good things. They enjoy their lifes and they usualy are in a good mood. that feature attracts people to them. A Pessimist differ from an optimist in reducing his inner feeling of happiness. He thinks that it is dangerous to show happiness - something bad might happen. Thats why, in pessimist's opinion you cant be happy. Having a conversation with such people desolates you like a desert wind. They are always complaining about somthing.An optimist is full of energy and work capability.optimists have some advantages: they are more initiative, energetic, less likely to fall into depression, the results of their work are more impressive. pessimists are more likely to give up in a hardships and easier to fall into depression. Optimists have more chances to achive success in job,sport and studing.