Too true. My usual beta-reader asked me how I thought up the many characters that I do. I told her that sometimes I take a small characteristic of my own and build very heavily around it.
There's no way to try to write a "this character reminds me of me" character and succeed. Everyone will see themselves in different things, different traits.
I made a character called Samantha and made her an emotional wreck. I'm not an emotional wreck, but I can be very emotional and cry at various things sometimes, so I built a big thing around that for my character.
I also made Samantha into one of life's victims, she's as soft as shit and lets people push her around. I also gave her a very jealous-minded boyfriend and she loves him more than life itself. I loved her because I felt sorry for her and wanted my readers to do so too. But In the end, I began to despise her for her frailties and having a jealous boyfriend who tells her what to do, the silly cow always does it too. I personally could never let a man push me around and tell me what to do; if I had a jealous man, he would be on his bike rather sharpish.
Then I made a character called Caroline, she's tough and won't let anyone push her around. She doesn't care about men and she vows to never fall in love, she only thinks of men as people to entertain her in the bedroom. She is also very intelligent, very strong-minded and very self-assured. I love this woman and built her in the way in which I think I would have been if I'd have been born into the right circumstances.
The funny thing is, my beta-reader reckons that there's a lot of me in Caroline. My beta-reader has actually met me in real life too. I don't see this in myself though, even though many people have always seen a great inner strength in me that I don't see in myself. So yes, other people do see us differently than we do ourselves, so our characters could never really be like us, even if we think they are.
Elodie