is the goal of life to be more happy or more intelligent? (I mean, ideally it's both, but if you had to choose.)
The more intelligent one is, the happier one can be. People with low intelligence, might be grinning idiots, however they are usual easily depressed and unhappy most of the time, because of their lack of intellect. For stupid people, happiness is fleeting, rather than a sustained satisfaction with one's self and life, that higher intelligence can provide a person.