Sure I will second that, go with what works for you. A good firm grip on the razor is very useful regardless of how you hold the razor. Some of the strokes I do are very untraditional but they work fine for me, like for example the inverted XTG stroke from ear to mouth on my right cheek holding my razor upside down in my right hand. This stroke allows you to stretch your cheek and neck skin upwards so that you can shave the elusive area under the jawbone.
Gripwise, I tend to hold my razor in the tradtional way with the scales at 270 degrees from the edge. Apart from a firm grip, it also helps to lock your wrist and do the strokes with your arm, that way you can keep a more consistent angle than if you do the strokes out of the wrist.
"Nothing would be done at all, if a man waited till he could do it so well, that no one could find fault with it." John Henry Newman