Nobody has mentioned this one yet, but my 3 Bala sharks seem to LOVE the attention. I can sit infront of the tank for hours and they never leave the front of it. I've been able to hold shrimp pellets in the water and the Balas will come up and take them, and keep coming back for more (providing the tiger barbs don't come and steal them). I love them they're my favorite fish in the tank! Also, when i have my hand in the tank if i'm cleaning the gravel they will come up to my hand and kind of "kiss" it as i call it haha. I think they're awesome, but i'd have to agree with everyone else and say platys are very sociable too.