Never cared for one but I'm on the lookout for it. I plan on keeping it too. I can tell you what I've read. They're finicky eaters and will often refuse food if they're being bullied by other tankmates. They are very shy and prefer dimly lit aquariums; therefore, they need lots of rockwork for hiding purposes. You probably won't see it too much while the halides are on.
I had a Paracentropyge (or Sumireyakko, however it's classified now) venustus for a little while, which is very similar to the Multibarred Angel in terms of care. It rarely ate what I offered it and hid most of the time. The only food it ate with gusto was nori. Other than that, it ate formula one every so often. It loved to pick at my button polyps and zoos, and it also loved to nip at the legs of my starfish. The starfish was probably its favourite thing.
One word of caution, angels of the Paracentropyge genus are collected from deep water and often suffer of decompression related problems. For this reason, not too many of these beauties will live long, even if they're eating.