You need to be more specific. "the looks on dude's faces is great" would be more appropriate. Personally I don't give a fuck about impressing dudes with my strength. I'd much rather impress chicks by appearing to be strong and muscular even if I am not as strong as the gh - growth hormone (somatropin) - - growth hormone (somatropin) - gut powerlifter (that probably hasn't seen his dick in 4 years) that can bench press a house. When is the last time you heard one of the bitches on Sex And The City say "I only fuck guys that bench 400lbs plus"?
I truly believe heavy is a relative term. Form is also another factor. So is genetics. I've seen quite a few big guys in my day that never go heavy. One I know does more cable and isolation exercises than I've ever seen anyone do. Of course, he also takes enough gear to kill an elephant-which is another factor not to be overlooked.
I seem to get my best gains from mixing up my reps and poundages. I also never do the same workout for a bodypart 2x in a row. It's my philosophy that keeping the muscles confused should stimulate growth. I also believe training lighter makes one less susceptible to injury. Injuries will hinder gains more than anything. With that being said, when it comes to training heavy, I leave my ego at the gym door.