Yeah, it's easy to fall for the allure of the green grass on the other side of the fence. Please allow me to ramble a bit--I'm fully aware that I'm not going to answer your question.
When I started riding in earnest, the cool kids rocked clipless, and the newbies bumbled along on their flats. So I learned to ride clipless, and became quite good---not as good as some, but better than most. But recently I've been hearing the Sirens of the flats singing to me. Sure, newbies still ride flats, but I have a few friends who ride flats and who have some abilities better than my own. I couldn't help but wonder what I was missing by not riding Newbie Pedals.
So I threw down on some nice pedals and shoes. The first time out, my feet were coming off the pedals, I couldn't jump, and I ended up cutting my calf. I was so frustrated that I reinstalled the clipless pedals onto the bike, and put over $300 in new gear on the shelf. I was angry about my stupid purchase.
But the Sirens wouldn't shut up, and I put the flats back on the bike. After all, flat pedal shoes look cool. Clipless-style shoes make you look like a sexually ambiguous leprechaun. This time around, I had time to think about the process of riding flats, so it went more smoothly. I could "feel" how I had been a "lazy" rider. I would sometimes put too much weight on my butt, decreasing pressure on the pedals. Sometimes on the super steep downhills, I would rest on my arms, again decreasing pressure on the pedals. My conclusion is that clipless allowed imperfect style, where flats force the rider to maintain better weight distribution. Within a short time I became competent.
I'm still not as good on flats as I am on clipless, but it's evident that the goal is within reach. My advice, if you stick to mid-level trails, stick with the convenience of flats. If you want to leverage your ability to stick to your bike without effort, go clipless. If you're riding at an advanced level on difficult trails... then I'm still figuring out that one for myself. I think the final decision is going to come down to riding whatever you feel like. There are people who ride better than either of us who can do so on either flats or clipless.