I am bodybuilding.. if you are a strongman, MMA fighter, boxer, runner, or just a gym rat wanting to stay in shape than your workouts are gonna vary quite a bit.
i take my sets to failure... usually 10-14 reps per set, I know how much weight I need to put on to accomplish this.. now when I am doing larger muscle groups to start off like bench press or squat or pulls than I go 4-8 reps heavy, rest, then go again. when I do pushups, pullups, dips I go for heavy reps split up. like I will aim for 100 dips and split it up into 3 sets.. or 140 pushups and split it up into 4 sets.
bottom line is for me I want to rip up those muscle fibers and have them grow back stronger, and also I do want to build SOME strength, although that isn't my main objective, I just like benching more than the 6 foot guy next to me who thinks he is the shit... so i incorporate that into my workouts.. now someone who is powerlifting or doing strongman is not gonna do the same thing, they just care about strength. so everyone is different.
all I know is that it takes more than a great workout strategy to build muscle.. it takes eating good and knowing when and how to eat, it takes rest, it takes supplements, and yes unfortunately for many it takes genetics. i've seen guys at the gym bust their ass as hard as I do but go nowhere, and I've seen guys half ass their workouts and look great.