Its really like any JRPG, different ending picking and the intrigue of choice and consequnce and all. I prefer going the vanilla route the first run, just for the sake of efficency. I can just get back to save scumming for all the other choices.
The corruption route only tastes sweeter the more "Pure" you can keep the main love interest
I prefer to be challenged in the vanilla route, unlike that Luna NTR that we mentioned where you have to actively engage , how the definition goes- Netorase or whatever, however in that game mc gets action from other women too, where you can deliberately avoid it through a choice of yes or no(loyality with no real consequence).