Rational depends on one's view of himself and the world. What seems logical for someone might seem completely illogical to someone else. We can only see the results of our actions in hindsight, so rational is something we attribute to ourselves after things went well as an ego boost. Better question is; What is rational? For me, that is a decision that doesn't involve emotions, biases, egos, and selfish desires but that is very hard because mostly we are those things.