I could go for INTj as most analytical. But ENFj most likable? LOL, I guess that's subject to opinion.

And I do think ESTps are the most optimistic type. Actually, being a sensor and a thinker helps this. When sensors are depressed, then can often brush it off and by the time they wake up the next morning it doesn't matter to them anymore. Also thinking is better because feelers are too busy taking the weight of other peoples' emotions on thier shoulders which can bring them down.