I've had one just shy of a year at this point, and killed two (each at about a week) before I got this one. Basically the first two were EXTREMELY shy, much more so than I had anticipated - I had seen multibar angels behave much like any other small reef grazing fish in hobbyist aquariums but was unprepared for the challenge of dealing with stressed, recently shipped specimens. They didn't want to leave the cover of the rockwork at all, and would only pick a little mysis off the bottom of the tank. Some combination of stress / mishandling / malnutrition did them in.
I vowed to give up after two equally miserable attempts. This was (imo) the most beautiful aquarium fish and I couldn't stand to kill another one.
Most of a year later, I was at my favorite fish-buying store (a shout-out for Blue Ocean Aquatics in milpitas!) and there was a multibar swimming around in a frag display tank with a ton of bartlett's and bicolor anthias, inspecting all the rocks for food, didn't run away from the front of the tank when I approached, and when offered frozen bloodworms, it ATE! I figured even I couldn't screw this one up, bought a stack of frozen bloodworms, took him home, and dropped him directly in the display. He was eating frozen brine shrimp within a week, and mysis within two. These days he'll swim past mysis to get to NLS pellets or GP pellets.
I don't know whether bolder specimens are caught in different depths or regions, or whether it's a handling thing, but they seem to exist in batches rather than freak individuals, as the LFS had sold several others the week I bought mine.
Unless you're well-prepared for a long qt and training phase in a quiet tank, finding one that's bold is a must. And even then, most of the "success" stories with this fish seem to end after 6-12 months.