Shawn Booth got real about his biggest pet peeve - and his ex-fiancée Kaitlyn Bristowe remembers it all too well. "Easily one of my biggest pet peeves is when you stop your car for somebody to let them cross the street, and they don't wave," Booth, 38, shared via TikTok on Tuesday, December 30. "Come on, all you gotta do is say, 'Thank you. Appreciate it.'" The former Bachelorette winner explained that if those kind words are uttered, he would simply respond, "'Alright, you're welcome.' Then we go on with our days.