That's why I like to keep pairs of non-schoaling fish... they're just generally more behaviorally complex, but like with Inchworm's cory example, there are some social fish that interact with one-another a lot more than most and have more diverse behavior patterns . It's just that, with my white clouds for example, I've never seen them do anything that really surprises or delights me... just follow one-another around and chase the female. Same with every other schoaling fish I've ever owned, aside from cories and khuli loaches (if those count as truly schoaling?)

I think groups of territorial fish in an appropriately sized aquarium are much more interesting to watch because you get to see them have disagreements over territory, re-arrange their own parts of the tank, etc.