been thinking about (and working on) this a lot lately. I've trained in a couple different styles - started with boxing, then Uechi-Ryu, then kick boxing, JKD etc etc - and i've had a lot of people tell me "this is the stance to use". IMHO, its a very personal thing, and should be structured to benefit the tools you're most comfortable with. For me, having been boxing since i was 6, its my hands. So i use traditional boxing meets JKD "small phasic bent knee" stance - which are really quite similar in many ways - most weight on your front foot, sideways/diagonal body position. Very good for puching fast and hard, but not so good for kicking.
This causes a lot of trouble for me, because my main training partner is very good kicker - fast and hard. At kicking range, he OWNS me. So i started messing around with my stance, putting more weight on my back foot, to allow faster kicks etc, but this led to a severe degredation of my head/body evasion and punching reach. Still not happy.
So i tried using 2 stances (former for puching, latter for longer kicking range stuff)- and worked on my defence and timing when moving between the two. Results are good - haven't had a shiner over my right eye for months. (i am also now working on a better grappling range position).
my point? umm - i guess its not to lock yourself into a single "stance", and say "i am this type of fighter", because its gonna be pretty easy for a good opponent to recognise what kind of fighter you are, and exploit your weaknesses.