Yes ive always loved Oscars, kept quite a few now, got a beautiful breeding pair,but nothing will come from spawning as to much action in tank with tank mates, but as you have stated there so comical, litterally like having aquatic dogs, wiggling at glass when you walk in door desperate for food.
Make sure you feed a very varied diet, this way they do not become fussy about a particular food, that can them become problamtic, also deshelled peas every so often good for the system,
Try to move things around in tank now and again, use big syphon for gravel vac, this way they do not become scared and used to changes, as some become grumpy and sulk for days after a change around..