I completely agree that squats are the "queen" of leg movements.
(actually, the honest to goodness term is that they are the "grand-daddy of all leg workouts" coined by an old body builder from the south, Boyer Coe).

I can also add that once you build really strong leg muscles, you just need to maintain them. You really don't have to beat them up week after week. However, since quads/hams are a large muscle group, they will take time to "grow". It comes easy for woman to build-up the quad faster than men...male hip structure is different than women. My clients do legs every 4th day during a building phase. After that, we split the leg groups over 3 workouts a week...also, don't for get the inner thighs.

Postitioning is everything when doing lunges/squats. I always advise clients to widen their stance. If not, you will step under yourself and loose balance/hurt the knees during lunges/squats. You can distribute the weight a bit better if your feet are the width of your hips (which is usually a bit wider than the shoulders). Also, you must take care of knees and make sure you can handle the weight being handed to you.
Terry
Oh yeah,
Core work is good stuff...I just use a few positions and do yoga.
However, I have a bias...I teach yoga almost every day.
Terry