I hate to admit it but now we have the mill, I find my self trying to maximize the wood from the trees we remove. Hence I am using a humboldt more. If trees are in a tight location, I want to control the fall right to the ground. The open face notch works well for this, especially on ground with a slope, and all the limbs have been removed (roll). I use a VERY wide angle and most of the time, the hinge wood remains intact until the log is at rest on the ground. The only problem is that you have to be VERY careful cutting the hinge wood, and have quick reflexes.
Species of tree and the amount of desiccation, and hollows must be factored into every fell. The other issue here is frost cracks, one can be seen on a log I am loading onto the mill. Frost cracks are more of an issue for rigging than felling, IMO.