Hi again!
Alright, so I had basically made a park and I was quite hooked on to it. I'll tell you now, I'm using a month old 0.0.4 build. I had used some cheats like fixing vandalism, clearing litter, renewing rides, etc. The strange thing I noticed was that some few guests would go on a ride the second time and come out with 0 Happiness. All would be well while they were on the ride, but as soon as they would come out the exit, they were ANGRY AS HELL.
So I experimented with two guests isolated in a place with bare minimum things like a couple benches, bins, Food, Drinks, Restroom and a Merry-Go-Round. The first time they both went it, they came out with nearly full Happiness meters. The second time they came out, one of them was FURIOUS while the other was ECSTATIC. If someone wants, I'll upload the park I have if they wanna check it out themselves. In any case, I have uploaded a picture right after the second visit to the ride.