The vast majority of the human romances are boring in Mass Effect. Kaidan is awful and has no personality, Ashley is a racist asshole, Miranda is an angsty tool, and Jacob is... the best of those four, but still not nearly as interesting as most other non-human characters. Jack is cool at least, and I haven't played ME3 yet so maybe the humans in that one are all right.
Still, I don't understand how TC could dislike Tali especially. She's kinda sorta the best characater in the entire game, right next to Garrus.
I do agree the romances in the Mass Effect series have a bad habit of feeling forced, though. I have bad memories of going through ME for the first time and accidentally romancing Kaidan with no way to stop doing so by the time I realized what I had done. I was just trying to be nice to the guy, not get in his stupid pants! I wish the games, especially ME1, were more clear about letting the player know what they were getting into so they couldn't get roped into accidentally having sex with someone.