Seems like you already made your pick? Mia's a safe bet I suppose (but so should any other of the main girls). But no worries, there isn't that much content (or tough/hard decisions) yet. When the new update comes (months from now) you can also decide to start from the beginning again. (Note that images you unlock are kept in the game's persistent file, so you won't loose those when starting over.)
At some point, I wanted to start worshipping the rich, smug whore Sophie. Even getting something from her is easier and faster than from Eve. And she's basically beautiful too. There's something about her.