Wow, reading about how everyone went about drafting their personal statement is an eye-opener for me! I never dreamed that people would spend so much time and read so many examples to get their own PS "right". My own philosophy was this: my personal statement needs to reflect me and only me.
For that reason, I never even looked at an example of another's personal statement ... I just looked for the requirements as outlined in the application (which had tidbits of info about a PS), and wrote. I also didn't take a long time to write my PS. I'd already put lots of time, thought, and energy into my decision to apply to medical school (and, eventually, to vet school), so all I had to do was to write those thoughts down, and structure them in a cohesive essay. I agree that that is easier said than done, but I also believe that it doesn't require the monumental research, 2nd/3rd/100th drafts, etc. that I've seen described in forums like these.
Please understand that I'm only speaking from personal experience, and was lucky enough to get into med school on try #1 ... so it worked for me. That old saying "to thine own self, be true" is the best guideline I know of when writing a PS, and that's precisely what worked for me.
Skye