What's wrong with basing a character off of someone you know or even yourself? I just feel like talking about this. A lot of writers I know won't do it or just don't, but there are some I know/knew that do. Pro and cons of it..? (There are pros and cons on everything just throwing that out there.) I have based a character off of someone I knew but that was long time and I did the same for myself...when I was younger.