Let me tell you this..

Advertising?
Way easier than Interior Design.
It usually takes me Lord knows how long to decide on a concept for design, and then develop... develop, and develop...
...and develop.. (days of sleep go missing at this point)

My current assignment for Minor 3 is a newspaper ad for our college.
We actually had 3 weeks for it, but I've been busy with other works so I kept putting it off until yesterday.
It took me half an hour to come up with at least a dozen concepts.
Another 30 minutes to decide on which one I want to use, and finish the ad with Photoshop.
And the best thing is, they accepted my idea.
Only a few minor changes on the fonts, sizes and placement of tagline.

And.... I'm done for submission tomorrow.
Not much sleep to lose over.