I was going for Karlach of course, but apparently if you don't give her one of her upgrades in act 1, which I didn't even know about at the time, you are completely locked out of her romance. And since I was going for her I shot down the couple of romantic talks Shodowheart and Lae'zel had way back when. No one has flirted with me in 70 hours. Even Withers is calling me a turbovirgin :(
https://i.imgur.com/AUXKMK4.jpg