I need help picking topic for my thesis!!!?

i need help picking a topic on my thesis. today everyone was having a discussion about what topic they want to do except for me. my mind was like a blank slate, i cant think of anything at this moment. i am very anxious and nervous at this moment. can some of you please help me brainstorm some of the ideas about the thesis topic. personally, i am very interested to do thesis regarding personality but my my professor says that i have to narrow it down because personality is too general. can someone maybe help me narrow it down for me please!