Well, a mixture of strength and hypertrophy. Let me give you a sample:
BB Squats - 250x10, 270x8, 280x6-7
Lunges with 45LB DB's - 12, 12, 12 (12 Reps each side so 24 steps)
BB Hip Thrust - 175x12, 175x12, 175x12
Leg Extensions - 100x20, 150x10, 150x 10, 100x15
SUPER SET W/
Seated Leg Curls - 50x20, 95x10, 95x10, 50x15
Seated Calve Raise - 90x15, 100x12, 100x12
Standing Calve Raise - 120x12, 120x12, 120x12
Now that I have written it out, mostly hypertrophy rep range with the exception of a couple of heavy squat sets (6-8 Rep). May just need to get stronger and get my lifts up to see the growth I am expecting. My leg's are the same size in circumference as they were 2 years ago, but I am also much leaner so I guess they have grown some. Also, I am very quad dominant. Due to the nature of my body mechanics ( long legs/shorter torso) I must be bent forward to keep my center of gravity over my toes while squatting. This puts more emphasis on the quads and less on the hamstrings. My glutes and hamstrings (what hamstrings) need to be brought up and are better engaged with other exercises. IMO