I'm a soto zen practitioner, and for a couple of years I've struggled with the staring at a wall kind of meditation. For a while I felt like I was totally wasting my time. All it felt like was that I was literally staring at a wall while at the same time being in a lot of pain. I concluded that Soto Zen must be for masochists and that I should seek another path.
I've persisted though, and I have to say the past few times I've gone to the Dojo I've started seeking beyond the wall, so to speak. I'm not saying I've gained some great insight, but I've slowly been able to see that the wall has nothing to do with it, if anything it's just a mirror of my mind. The wall has started getting blurry and I've been finding myself in very relaxing places (Not the point of zen I know, but it's happened).
I'm aware I shouldn't attach to any experience, and should carry on doing zazen for it's own sake, but it is SLIGHTLY easier, knowing that I feel I'm doing something a bit more enjoyable.