Ayaka Mutou is one of my favorites so I like all of her works.
NSPS-367
NSPS-457
NSPS-982
NSFS-113
NSFS-160
Of those I would have to say NSFS-160 is my favorite.
I also like the wife on business trip series. From that series I like
NSFS-064 Toujo Natsu
NSFS-181 Kanon Urara