Yeah, completionism is definitely a thing. I haven't tried Hard Mode yet...I want to go in there with a team of all 60s and I'm still some way away from that with a couple of my maidens. Challenge mode does frustrate me a bit though, since I'm having to level maidens I'd never use in Hard Mode because of the team composition restrictions. I may just end up ignoring all the 'Only Nature Maidens' challenges because Nuka sucks ass compared to...well, almost anyone else, and I don't have either of the other two nature maidens.