Hello and welcome! I have only owned tree frogs, so I do not have much input to offer. Tree frogs are definitely harder to breed than the darts that you listed. I prefer tree frogs because I like nocturnal frogs and the beauty of a tree frog (I also hate fruit flies!) Most people dislike tree frogs because they are nocturnal though, so that's something else you have to take into consideration. I would not consider a pacman frog if you want the experience of breeding a frog. They are nearly impossible to breed, you either have to replicate the exact conditions of their natural habitat or use hormones, both of which are dangerous and possibly deadly.