Unfortunately lean is only one factor of many. As mentioned above limb weight is another and tree size - once trees reach a certain weight even wedging becomes difficult. Once trees reach a certain size and/or weight DO NOT try to fight excessive lean without having either the experience or the right gear - it will come back and bite you.
I'm lucky as I've had the opportunity to fell a lot of trees where if something goes wrong nobody dies and property doesn't get damaged. It also taught me to not get cocky and think I am a tree felling guru. In domestic situations I am very very careful yet have still had the odd mishap from thinking I can do the impossible. Unfortunately at the time I thought it "was" possible
Experience is the only "near" guarantee.
Anybody that says they can put any tree where they want with wedges alone are tugging themselves - and there are many that do.
I've had trees that were cut perfect, getting wedged, and going where I wanted get completely misplaced by sudden strong, unexpected wind gusts. All fine in the open but in a domestic situation without a pull line etc you'd be in some serious trouble!
If I said I'd dropped around 10,000 trees and misplaced about 20-30 of them that looks like a good percentage. However those 20-30 in a domestic situation would have cost me millions of dollars in property damage.
Sorry if I got off track a bit