Just to add to this having received my first rainbows and first ever "cool fish" a couple days ago...
A lot of people recommended I go with schooling nano fish, and I don't regret going with bows for a second. These guys are awesome.
Super active, interesting, beautiful to watch, and they're really personable! They explore alot, and swim up front to check things out when I walk past.
Would I lose points in a Dutch competition, if I could even place? (Can't remember stocking requirements/guidelines)
Probably.
But these fish are awesome. And it definitely does bring a whole different aspect to the hobby that I think I'm really gonna enjoy.

Rainbows can be a lot of fun to keep as @GreggZ well knows