We have Trilineatus (sold as juli most of the time) They had babies just a month ago, but we've had them for a year or so. We also have some Brevirotus or something. The trilineatus are really active compared to the brevs. They all swim around, but the brevs like to hide alot. We haven't had any other types of cories. Trilineatus are really common probably because they are so active. They also aren't particular hard to breed from what I've read, but I didn't do it on purpose so who knows.
We have 2 Triline and 3 Brev. Oh and of course 19 Triline babies. The more the merrier it seems for corydoras.