That's almost exactly what I was doing for years. Two differences: 1. I sometimes ask 1-2 technical questions, for example if the candidate claims exceptional knowledge of some important (for us) technology, but his/her resume doesn't show extensive use of it. Like: "You say you know CouchDB inside out, but you've used it only once and not for long, interesting.... Can you tell me how the _changes feed works - if I listen on this feed do I get just the changed documents IDs or whole documents?" 2. Instead of "what's your best project" I ask more aggressive question - "imagine I give you 1 million dollars right now and in return I want to be a part of what you use it for - a share of profits, credits in the movie, etc. What would you do?".

Edit: ah, the almost mandatory third question: why do you want to leave the job you're currently having?