You got

Sybill Trelawney.

You perceive things other people dismiss, and you've learned to live with the loneliness of seeing what nobody else can see. People laugh at you, and sometimes they're right to — but sometimes you're the only person in the room telling the truth, and the fact that no one believes you doesn't make it less true.

• intuitive
• eccentric
• underestimated
• perceptive
• theatrical