prima Donna
A Skeptic person
"walking encyclopedia"
Smart.
annoying
a lair
A person who understands everything is often referred to as omniscient or all-knowing.
you call them a computer tech
An optimistic person.
A person who wants everything to revolve around him is often referred to as egocentric or narcissistic. They tend to prioritize their own needs and desires above others, seeking attention and validation from those around them.
beck and call
needy
Human.