I think that both decision making strategies usually get the person who is making the decision the results that were intended. Personally, I use both depending on the type of decision I am trying to make.

"What drink should I get?"- Typically whatever pops in my head first.
"Should I get married?"- I've been thinking about this for years lol

I know people who are pretty set on the whole marriage question but take forever deciding what to get at a restaurant. I used to call these people idiots, but they probably think the same of me...