You should definitely check the sharpness of your razor, and skin stretching + proper angle matters, but after that, remember that it's shaving, not depilation!
I too get a near perfect shave with my DE and Feather blades. But the problem is that I also tend to get more irritations that way. After sufficient practice, my straight shaves were BBS, though one could argue not as tight as my DE shaves. Not a problem, since I was irritation-free.
The straight razor knows how close it must cut, and is never excessive in that matter.