Hi Sidony,
When I was going through my depression, I was over my brother's friend's house with my date, my brother and my sister in law. He gave us a tour of his house and we came to an empty room and he said "And this room is like Jax's personality..." My brother cut in and said "It's pure, non complicated, spacious and clean" and he turned an all out ugly insult into a positive thing. (My brother can be very sweet.) But yeah, I've felt like I didn't have a personality.
Try to see it as my brother sees it. Instead of seeing something negative and bad-change your perspective and make it into something positive and good.