I thought to ask this cause today I spent like 3 hours learning Morning Musume's Nanchatte Renai dance (Yes, I am obsessed, thanks for asking.
), and it's unbelievably fun to learn dances to your fave songs
. It brings a whole new depth to them imo, and it's cool just to be able to know a dance choreography to a certain song~
and it makes taking showers a lot more fun... or am I the only one who dances in the shower? 
I'm still rusty with Nanchatte Renai, and I've started to learn Shouganai Yumeoibito too, which is way harder
Wish me luck...
EDIT: Well, these are more parapara-ish, but I can also do the dances to Trauma, independent, and MY ALL. But then again, what kind of an Ayu fan doesn't know those?
. And I can do the parapara to mihimaruGT's Gazen Yeah!