I like how the munjpets are a mixture of Cozyville and Member Wars. You can take care of them and help them grow, while at the same time you can have them fight other munjpets!
I find them to be a very casual sort of RPG. I can let my imagination run wild, and not have to worry about how my pets behavior affects other people or their characters. Since my one and only battle was a disaster, I have been keeping Night home at nights. We'll have to see how he does later on, when I have enough FP to get him healed up.