I keep my 4 rams in a 29G heavily planted tank with 9 neons, 4 glow lights, 3 cory's, 3 moons, a bamboo shrimp, a pair of guppies and 1 zebra danio. The rams stick to themselves tho they don't seem to like my moons much. The 2 Blues paired off and are preparing to spawn and the 2 Golds spawned last night. I feed them a varity of things, frozen bloodworms, fresh brine shrimp, cichlid flakes, freeze dried mixes, spirolina flakes etc. I only feed them every other day with what I mentioned above.
The spawing "dance" that the males do is really kind of cool to watch, but other than that I think it's a personality thing. Each is different. My blue male thinks he's the tank stud and both the blue female and gold female torment the moons. No one does any damage, they just play at chasing. I think it's like anglefish. Sometimes you get some you can have other fish in with and sometimes you get an overly aggressive one. Give the Rams plenty of places to hide, they love to surprise "attack" each other.