Ehh, who likes nightmares? I say dream, cause If u like ur dream, u can try to make it a reality

Both are unrealistic and can play tricks on your consciousness, although dreams give you a feeling of a truthful lie that you know wouldn't be real while nightmares usually play tricks with the actual truth.

hmmmmm dreams are good but nightmares help you be wary of things around you as well as giving you scenerios of what can happen at random that which you should watch out for, so in a way, nightmares can be helpful... scary, but helpful

i don`t have dreams so if i did they would be unrealistice.... my nightmares come true almost always....

everyone has dream its that you dont remember them:
Learned this i univ. (if there any objections then dont blame me i didnt say this blame my profesor, and besides there are many sites that say its true)
REM (rapid eye movement)its what causes dreams. Ocurrs about a total of 2 hrs
Did you know that if you sleep 8 hrs a day and if you live around about 90 yrs. Youll be wasting 30 years of your life, you can live another life with those . I say wasting since you really only need 2 hrs a day

It depends on the type of Dream or nightmare if its a dream with fairies and magic of course its unrealistic but if its about a forgotten memory or something like that then thats realistic the same with nightmares Although both my dreams and nightmares are unrealistic Mostly

For me my dreams are more realistic then my nightmares. Most of my dreams are about me carrying on my daily life, with a few added twists mind you, but there still relatively normal.

Sometimes, it's easy to live in a world full of dreams and nightmares. Than a world full of real sorrows of life.