I would say doing without thinking is better than thinking without doing. I know plenty of successful people in the first group, and plenty of unsuccessful people in the second. But opinions might differ.
And then there are the 'sales type'-guys if you know what I mean. They just talk and do: have their finances more or less straight, have a family, lots of social connections, ... .
I agree that both thinking and doing is best (as hopefully most here are doing). But if I have to choose, I would choose doing over thinking.