Many of us are quite attached to our guides. LOL, I won't be surprised if you don't have a list of 10 recommendations shortly.
Our guide is
Bernard Lebeaupin (just ask for Bernard, the folks who answer the sales center phones all know no one can pronounce his last name). He specializes in phone sales and has been a tremendous help to us with our two direct purchases. He's as friendly as can be, and I really felt he was looking out for us. (Yes, I know he's a salesman and he's really looking out for interests besides ours, but he earned our trust during our initial purchase. We bought back when they were offering friends and family discounts, but we didn't know to ask for it. Friends of my parents are owners and were willing to refer us. When I read about the deal here on DISboards, our contract was already being processed. I asked him if we were too late, and he said, "oh no, we're going to make that work for you." Sure enough, we got a new contract to sign a few days later and saved quite a bit of money.)

Of course, if you decide to go the resale route, you don't need a DVC guide.