people who drop weights on the ground. ie. dumbbells. Once again...if you can't control it to put it down....don't lift it!!
This is actually a double edged sword. I do 1-arm rows with a substantial weight and occasionally can't get the last rep. So I drop it. The floors are padded for a reason.
However, if you're talking about the a-holes who drop them for attention, so everyone looks at them and their "big" weight, That's definitely a big one for me.
Also, don't forget about...
The double-edged sword with unsolicited advice: Sometimes I feel like I have to help someone so they don't snap a ligament, or rupture something, but beyond that, I leave everyone alone.
--Gyms that play techno or easy listening. This isn't the goddamn Lifetime network. Grow a pair and play some real f-ing music. (statistics show that METAL played while working out increases testosterone levels)
--People who throw down a bunch of history lessons about how strong they used to be after you spot them...sorry dude, if you aren't that strong now, I don't give a sh!t. I'm not going to think you're cooler than me because you benched 450lbs 20 years ago
--people who feel the need to converse with me in between sets (sorry buddy, I'm not paying a membership to bullsh!t with you. I have my headphones on for a reason)
--People who don't know how to spot properly. (This one guy was trying to lift the weight for me. I was pissed)
--People who piss and moan about grunting...If the weight calls for it, I'm gonna do it, and you can B!TCH all you want, but you might find your neck under the bar next time
AND NUMBER 1 ON MY LIST:
EGOS...Leave that crap at the door. Everyone is there for 1 reason, to improve themselves. Whether its physically or mentally, there are no reasons anyone should think they are better than anyone else. Everyone has a goal and is trying to achieve it. Who the hell is anyone to judge them and piss all over their goals?