I'm definitely a control-freak, but use an amazing Disney-certified TA for our trips, and will continue to do so. All I have her do is book the room/package we want. Saves me from calling, and gives her a commission at the same time. Most important of all to me is that, as soon as a discount becomes available for our time frame, she snags it for us immediately, whether it be at midnight or 6:00 a.m. She is only an e-mail away, and normally always responds to me within minutes.
I'm surprised at the number of people who won't consider using a TA because they want to "plan their own trip." You don't have to let the TA plan anything if you don't want to! Planning is half the fun for me, so I do it all. I was lucky enough to find a perfect TA, and feel using her services is a win-win for us both.