>>713222097
The game is strongly designed for you to get the neutral ending, then reload and get the pacifist ending (you can't get Pacifist at first), and then Genocide to see what happens.
But however you like.
>>527480720
Eh, it just comes down to how fucky your libido is and whether or not you're into furries/objectophilia/plushies/elementals/ghosts/the undead/etc.