They have tons of personality, they are active, they look great, they are worth a lot and compatible with A LOT of fish; what else would you want in a fish? Watching them eat worms is so entertaining. Every once in a while, i go in the backyard and dig up a small handfull of earthworms. Than i throw them in. The dats grab one worm (to themselves) and slam it up against the driftwood and glass like it's a live animal. Feeding them is very entertaining. Watching them grow is very rewarding because they are difficult fish to keep healthy. But as long as your tank is suitable, you should be able to keep your datnoid(s) for a very long time!
Good luck!!