It's hard to say why, but I think cancer is the best thing that has ever happened to me.
That's interesting, what makes you think cancer is the best thing to happen to you?
It's taught me to take life day by day and be more appreciative of things. Also, I've lost 20 kg.
Beating cancer can have a profoundly positive affect on your life, but most people won't understand if you tell them that cancer was a positive experience for you. For a lot of people, cancer is something to be feared and others have lost loved ones to cancer. If you're going to talk about the positive effects of cancer on your life, you should make sure it's with people who understand, as other people may be offended by such remarks.
It's okay. I didn't want to discuss it with people who are afraid of cancer anyway.
I can understand why, it's a sensitive subject for many people and not everyone can see it in a positive light.  It's probably best to be around positive and optimistic people anyway.