i always liked this analogy with HIT training: if you want a tan, do you sit out in the sun with lotion on for an hour or so a day, or do you lay in a fire for 30 seconds once a week?
i powerlift now, and here's the most interesting part. i don't do any forced reps, no negatives, no supersets, no drop sets. if i need any help on a rep the set is over. i do more sets than i ever did before. the end result was all of my lifts shooting up. i used to internalize the "intensity" mantra and did massive amounts of drop sets, burnouts, anything i could to make it hurt. i stagnated like crazy.
these days i leave the gym pretty clear-headed. after a squat workout i can walk around just fine and the next day i'm not screaming in pain. while it may strike some that i'm not "intense" enough any more and i know some people are going to think my workouts are too long (usually the main lift of the day takes me over a half hour all by itself), i'm stronger than i've ever been.