I use a 90/14 for just about everything and haven't had any troubles. The only time I use a different needle is when I need a specialty needle, like a jeans or leather needle. I sew with a variety of cotton and polyester threads and don't have problems with any of them, whether piecing or quilting.
It probably depends greatly on your machine. I would imagine that the spacing tolerances vary from manufacturer to manufacturer, and probably even within the same model due to variances in manufacturing and any wear & tear on the machine. Needles don't cost that much - if you're having troubles I'd say pick up a variety pack and try them all out and see what makes your machine happiest!