Industry insiders tell us what they can't stand when they're on the job. “Arrogance, my own and that of others.” —Jon Acuff, author and speaker “People making assumptions of your professional experience based on a youthful appearance.” —Carrie Moore, Hyatt Regency Dallas at Reunion “When folks don’t realize that their one change affects 30 others (the sound folks, the lighting folks, the stage manager) and just decide to do it.” —Nikki Toyama-Szeto, Urbana Conference “When people come in first thing in the morning and instead of starting off with, ‘Hello’ or ‘Good morning,’ they start telling you what they need.” —Reneka Edwards, Hyatt Regency Atlanta “Sleeper concessions. You get everything done and expect to go to contract, and at the last minute, some new concessions come out. They sneak in there and hold things up.” —Jacque Woods, Hyatt Regency St. Louis at the Arch “Lack of follow-up. It’s amazing how many people won’t put in the effort when there is already an existing connection there.” —Kate Bleakley, Visit Aurora (Colo.) “When people take more than 24 hours to respond to an email. You never know the opportunities that are missed or delayed when emails go unanswered.” —Mandy Volpe, Georgia Tech Department of Housing “The multitude of little changes that take place right before an event.” —Kari Bloom, Harrison International Seminars “Deadlines going unmet.” —Tessa Kranz, Anaheim Orange County CVB “Lack of self-initiative when it comes to staying educated on technology and changes in the industry.” —Celestino Ruffini, Galena/Jo Daviess County (Ill.) CVB “When suppliers think because I’m a Christian meeting planner that my attendees want to do weird ‘Christian experiences’ during a conference. Trust me, if you think it’s weird, I’m definitely going to think it’s weird.” —Jamie Wagner, Cru, Great Plains Region What are your professional pet peeves? Tell us below.