This is a very hard question for me to answer! I truly like all of them for different things. I suppose it would be easier to name my least favorite companion, which would be Gale, but even he has his moments and I'm even starting another playthrough to romance him and see if I can connect more with him.
I guess a companion that I wish I liked more than I do is Wyll. I do like him, and he was my first pick for a romance, but he can be very hit or miss.
