Squats are staple, I mostly d them for low reps (due to form-issues, I love to keep perfect execution, and low reps are the key for me for that). Variations of squat: front squat, olympic squat, wide-stance squat, smith-machine squat. I love leg presses with heavy-ass weight with high-reps (never go below 15)
I had great experience with barbell lunges too.
For hammies, I utilise standing and seated leg curls (I only have access to those right now) and TRX leg curls. Oh, and stiff-leg deads, with forefoot elevated (actually a female trainee taught this back a year ago. Reasoned that you have to stretch the shit out of them to recruit them properly)
My hammies were my best for years, I've mostly sticked to curl and DL variations. For curls, I always hold and squeeze, contract them hard, and concentrate. For deads, I like slow eccentric to really feel the stretch, and hold it on the bottom for a sec or two.
I always loved leg training as I've always gotten wonderful results. Everyone should admit that they're fun to train once you've found out how to do them properly.
Oh, btw, I love smith machine quarter squats with neck pad and belt, knee-wraps with light weight. Just don't forget to put on the safety collars, as those two 25lbs plates will surely fall off! (-sarcasm, actually the way 60% of people are doing squats :o))