I have read all the posts in this thread. Here is what I do and it works. Squats, Squats and more squats. Back Squats, Front Squats, Hack Squats, Box Squats and Jefferson Squats. Do the compound exercises and forget the isolation exercises until you get some size going on. If possible do the squats in a power rack. Then if you get stuck and have to dump the weight you wont get hit when it bounces.
Another thing, superset the squats with jumping squats, no weight on the jumping squats. Dont worry about how much weight you can lift just work to failure after a good warm up. The rep scheme that works best for me is to do 8 reps and work up week by week and when I get to failure at 12 reps I will add weight and start at 8 again.
Here is a simple yet effective leg routine based on squats.
Back Squat 4x8 (4 sets at 8 reps) Failure on the last set. pyramid style
Leg Press 4x8
Hack squats 4x8
After that you can add what ever you like or call it a day. Its only 12 sets but your legs will be toast. You can also add in some wide and close stance work, if you can . Oh and dont forget to streach after the leg work out.