good thing or bad thing?

you know, how miraculous one's mind works. some ppl put so much thought for some really simple stuffs that do not even require that depth of thinking. conversely, some ppl just simplifies anything that comes to their mind. which is better?

do you think emotions and thoughts are inter-linked? between one person and another? they just pass on so easily. like an infectious disease that travels via air or something. how easily your emotions, your mood is affected when you see a happy couple getting married. or when you see someone grieving. thoughts and reasoning hits you then next thing you know, you're so affected.