Demonstrate mental superiority and mastery of all subjects. These are sensible goals and ones that can produce great joy. The social skill of an engineer must be evaluated on the basis of these rational objectives, not on the basis of bizarre and nonsensical societal standards. Viewed in this light, I think you'll agree that engineers are very effective in their social interactions. It's the ''normal'' people who are nuts.
Engineers like to solve problems.
If there are no problems handily available, they will create their own problems. Engineers believe that if it ain't broke, it doesn't have enough features yet. No engineer looks at a television remote control without wondering what it would take to turn it into a stun gun. No engineer can take a shower without wondering if some sort of Teflon coating would make showering unnecessary. That's a good thing, society-wise.