They do better by themselves unless you have a large aquarium because they can be territorial of the surface. I keep mine in a 16g, along with a blue gourami who is also a species known for being territorial around the surface and they do fine together.
When you first bring a AFB home they will usually only eat live food, such a crickets, and maybe freeze dried because it looks similar. After I started hand feeding mine it would eat about anything from my hand, and now I no longer hand feed it because it will eat the omega flakes I feed my girls greedily lol I still give him the occasional live food when I catch a bug around the house or out back. They need a good aquarium hood, and are known for jumping, but I haven't had any problems with it. Having live/silk floating plants will give it places to hide if it feels threatened so it won't feel it needs to jump.