Dear God the ones at mine are just plain awful. I cannot believe people pay hefty sums of cash to get "trained" by them. When I first started there I asked this one PT for a bodyweight test on his handheld machine, and he asked me about my routine (WBB1) and told me that's a very poor routine and also told me my diet was bad (200+ protein a day, 2500 cals). Now it's 3 months later and I've dropped 5% body fat and have made huge gains on the weights and I just walk past him with a big smirk on my face every time I see him. I watch him train these fairly big (overweight) guys and he has them do very quick circles of leg extension/curl then quickly to smith machine for squats and incline bench, and around and around with VERY light weights. I mean the guy he's training is barely breaking a sweat. And this is about all I see this guy have people do. That and some plyo's on a box. Let's hear some of your personal trainer nightmare stories.
Oh and the best part is, I am currently being trained by the best group of trainers a guy could ask for, WBB! And it costs me nothing! (Well ALN gets quite a big chunk of my change every order, haha).