I'm posting this mostly because I had a pretty unconventional interview process.
An Amazon recruiter reached out to see if I was interested in applying and, after I submitted my resume and personal information, she set me up with a 30 minute online evaluation (an AMCAT). From what I've gathered, this is more of a preliminary screening before passing a candidate onto the phone calls; however, after passing the test, I was given only one technical interview phone call.
The call lasted about an hour and only consisted of technical questions. The engineer on the other end only asked what language I was most familiar with after commenting on the number of languages listed on my resume. This was the extent of any and all personal questions I was asked, as the remainder of the phone call was technical. The interviewer was very easy to talk to and I actually enjoyed working out the solutions to his questions.
About a week and a half later I was given an offer. All in all, my experience was pretty weird since it lacked both personal questions and the usual second technical interview phone call.
tl;dr - Even if your interview process is unconventional, just go with it.