250 lbs +: ah, the promised land. the conquering heroes, rock granite monstrosities to the last, here live as kings, attended by scores of female fitness model concubines, are hand fed steak and whey ****tails, and spend their days eating, squatting, and telling tales of byegone battles with the logbook demons ..
230 - 250lbs: now that's what I'm talking about! you're massive and nearly there, you've come so far, keep slapping on those 2.5lb plates, keep forcing down the meat and rice, grind out those reps, come on, you're already a god amongst mortals .. just one final push for bodybuilding immortality. it'll hurt, you'll bleed, you'll nearly die .. but it'll be worth it once you're there.
200 - 230lbs: a prestigious level of varying degress of 'above average'. everyone knows you work out, you're damn impressive and probably one of the biggest guys in your gym, you're on 500g protein a day and people are asking if you're on steroids and can they train with you (this is when they'll ask, you get any bigger and they'll be too scared/in awe to talk to you)
180 - 200lbs: you're at the average muscular level, the one which is the hardest to break out of. you keep pushing on for that 200lb barrier, eating like a horse and making the logbook your ***** .. but beware, it's easy to get complacent here, you've probably worked your way up to this weight and kudos to you, but lemme tell you, you're still no bigger than the average naturally wellbuilt joe, THIS is when the work starts.. breaking past 200lbs is going to take a much bigger effort than getting to this level did.
160 - 180lbs: standard bbing.com overanalyser/beach boy territory. unless you're serious about your training you're doomed to stay here for eternity, since you're only eating egg whites and chicken breast for fear of losing your abs (and if they do fade, you go on a panic-cutting phase for six months), you want to hit the body from all angles and so your training includes cable crossovers, tricep kickbacks, concetration curls (I need a pump man!!) and you'll be gaining a massive 2lbs per year.. if that.
140 - 160lbs: okay, this is where you have to eat and eat hard, unless you want to stay in the 'skinny runt' category forever. damn, looking at you makes me hungry. someone get me a steak! your routine obviously sucks arse, so make a new one centred around the three big lifts and compound movements, rest and sleep well, eat everything in sight..
120 - 140lbs: as above, only with the addition of a prescribed seefood diet and "FOR THE LOVE OF GOD, EAT SOMETHING! QUICKLY!"
120lbs and under: unless you do something drastic, the only use as a human being I can see for you is as an emergency food source.