I like to do 3-4 exercises per muscle group, Once a week. The key is to get the recouping factors in. You want your muscles to recoup as fast and efficient as possible, that is why workouts are different for everyone.

Your workout style is dependant on your goals, ie mass, heavy with low reps, cut, low weight with high reps. Change up your style every month or so if you see a body part lagging..

Train hard and with intensity..