Leg day.. In my opinion you either love it due to the progress your physique makes as a whole from consistent and challenging workouts or you don't do it at all! Having big arms and a big chest is awesome and something I and most people spent time on when they first started lifting weights, it is probably the most enjoyable workout/day amongst weight lifters & bodybuilders to do dude to the pump we get and how we look in the mirror after a great chest/arm session.
Leg day though, should not be so enjoyable and if it is then in my opinion you clearly aren't pushing yourself hard or effectively enough to cause enough trauma to the muscles in order for them to grow back bigger and stronger.
I must tell you though that I WAS that guy that used to skip leg day and focused only on the 'show muscles' for the first 2 years at least since I started lifting weights at 17. I am 23 now and have been training seriously for the past 4 years to build the type of physique I crave (Men's physique) and I can honestly say that the positive progress and changes that I have made to my physique is dude to my gruelling leg workouts.
When it comes to leg training I believe in sticking to the basics (squat,leg press, lunges) unique exercises have their place in any program but many people focus on them too much when they should really be mixing up their rep ranges, volume, intensity and frequency with the basic movements. I do add in some unique exercises from time to time but again if you're training legs at a high intensity with heavy weight then those basic movements should be leaving your legs feeling week and you questioning yourself as to why you put yourself through such 'enjoyable' pain, that's right I crave that pain it means it's working!
Below is my 'Shock workout' that I throw into my training routine once a month to mix things up and keep it nasty! Apart from that like I said I stick to those big compound movements to build size and strength with isolation and machine exercises to help bring out the detail and separation of the muscles.
Barbell Squat - 5 x 10 reps
Barbell Bench step ups - 20 reps (10 per leg)
(Rest 3 minutes)
Leg Press 4 x 12-15 reps
Box Jumps - 4 x 10
(Rest 3 minutes)
Barbell Walking Lunges - 3 x 30 reps (15 per leg)
Single leg leg press 3 x 10 reps per leg
Leg extension - 3 x 15 reps
*drop set of additional 15,10,5 reps on final set*
Lying leg curl - 3 x 15 reps
Give this a try if your current leg workout is feeling stale or you feel like you've hit a plateau with your current leg development!