I'll give an example. My IEE brother and 2 of his university pals made an advertising and digital marketing company a year ago and last week they were hiring, because its going well. He interviewed 3 people and later that day he asked me for my opinion. Obviously one of the 3 was qualified, however the guy was 4 years older than they were and was asking for more $ than they would offer, so it would be a bad idea to hire even him considering he didn't seem to take them seriously (age difference). We discussed and I gave my advice based on the information at hand.. he got upset e_e and stormed out.
I swear I just presented the facts and calmly advised him not to hire either of them, due to all the drawbacks each had for the post. Once hired ppl are hard to fire here and they can't afford that.
some time later he apologized (WTF) and told me I was right, they need to keep looking.
my best guess as to why he got upset was is that I tend to see every possible way something can go wrong... so he may be enthusiastic, but I just take the situation and shoot it full of holes so to speak and once all the flaws are presented I formulate a solution.
e_e so a lot of the time, I'm calm and just explain stuff and then people get angry, because its not what they wanted to hear... while I'm just being constructive.