Somewhat of a random thing but I noticed a "Kuro was here" on a board when doing the debriefing for getting Hina out. Made for a funny little addition (especially given how old Kuro is!) and added to the charm of the game!
Also, even though I always choose Aki for who gets to go with me for Suzu's uniforms (because it is a very deep convo and allows Aki to quit beating herself up) I like all the choices, either because they are funny (Yui, Nagisa), gives you insight to their character (Yukari, Kagome) or it is just fun to see (Jun, Miko, Nene, Kana). plus you get to see just how jealous Kana can get, with some of the choices!