I'd I look at them with a non-realistic face. And I would reply " Isn't it amazing! C:" And then I'd look at them again and say "Wow really? te figured that all da yourself sherlock? Nothing gets past you."
My best Friends tell me this on a regular basis, and I say it myself, so I usually say, "Yeah I know." Even if an enemy says it, I usually say, "Yeah I know. And..loving it." I am a little strange, so I'm used to people thinking so. They're usually right. :)
Depends whos saying it. If it's my Friends in a joking way, I'd be like 'Yush, I know I am! And it's good to be weird, te should try it,' but if someone is actually meaning it I'd be like 'Well, te are too but I never complain about it,' XD
I would tell him/her that I know I'm weird, that I'm proud of it, and then start spouting enough weird facts about myself until the person regrets calling me that. But I seriously so agree that I'm weird. I've got a diviso, spalato personality, ADHD and awkward obsessions with many Anime characters. XDXDXDXDXDXDXDXD
id mostra them this picture and tell them to talk to the hand, because they dont know DIP about me. :D :D :D then id frollic off. like the "idiot" i am.