spoiler in comment
The fact that only one option matters kills the enjoyment for me. If you treat the enemy with kindness but decide that you don't want him, like I did in my first play through, he will end you. I tried every option combination with the non-romance one, and it all ended up in Julien being a typical selfish human who betrays. I picked the romance option last and didn't like it when the confessions came. It sounds so hypocritical, knowing the alternate path. The vampire do all the heavy lifting in this romance and the human is the one that sucks all the benefits out of it.