Writing really is about experience, isn't it?

[jedusor]

I've been working on this book (working title "Ring Free," although I'm positive that won't end up being the actual title) a lot lately, and noticing something as I do. Regardless of whether I intend it or not, each character is taking on aspects of people I know. Some characters start out based on one person and turn into another completely; some are combinations of several people. The ones who don't resemble anyone I've met are the ones I haven't developed much yet. I'm not sure if this is a sign of good writing (basing it on experience) or bad writing (unable to form entirely original characters).