thoughtful
intellectual
pensive
smart or shrewd
curious or inquisitive.
I think first three are best thou
Pensive.
numerologist
Paranoid
Someone who thinks that being a hipster is to mainstream can be referred to as a jazz-maniac.
that's a hypochondriac.
paranoid
A self-centered person or egocentric individual is someone who thinks the world revolves around them.
You could call them "arrogant" or "overbearing."
A know-it-all!
God
That was a terrible question, because you call someone who thinks they are ill all the time a hypercondriac. So as in Jeopardy, "What do you call someone who is constantly under the impression that they are ill?" Answer: "What is an a hypercondriac?" That is correct!
True