I tried to give her another chance thinking maybe I was missing something, but in that first meeting before I even agreed to take her on she just was such a jerk. I mean she really was a jerk and for RP purposes, me playing a human noble he attitude in that whole conversation, her beliefs and what she says made me feel like she wouldn't fit in. It's already been slightly established at that point that we need to get some nobility on our side. I don't RP as much that I am nobility because I'm also a mage which distanced my character from that but they are still my family and her attitude from the start is something that feels like having her around would be a headache.
She doesn't like elves. She doesn't like nobles or people she perceives as better than her. She acts like idiot trash and likes to believe she's doing some good when all she does is petty crap. She doesn't even really care about the rifts as much as her own butt. She's extremely selfish and out for herself. Yes, to a degree most are but from my view you have other companions who are far less and looking at them from my perspective I've got:
Cole - as crazy as he seems, his sole motivation is to help others which I can get behind
Dorian - who wants to close the rifts and wants to see tevinter be a better place - who is very idealistic in that desire but also faces the reality of what it is. He is there to make a difference.
Cass - She wanted to fix things. Yes she appears very religious and almost a bit of a zealot until you get to know her and then you see she's rather progressive all things considered. Not as progressive as Leliana, but better than you would expect with a pragmatism that gives her a kind of balance that is rather likable.
Varric - He is there because he wants to help. There is no other reason he is there as far as I can discern.
Blackwall - He has his motivations and even though they can appear selfish, he is trying to make up for his past, to amend things in his own way and to be the best person he can be. Whether I agree with what he did or not that's something I can get behind.
Solas, Viv, and Sera all have their own selfish reasons to be there. Solas is the only one of the three I'm comfortable with because he appears to care about things beyond himself. Viv even does to a degree but she's using the inquisition for her own reasons or that's how it seems to me. Sera? There is nothing about her from the start that makes me want to have her along. I wanted to try but I knew I just wouldn't take her. If they made her less annoying I probably would but I just don't like her. From the first meeting it was not good. After doing her personal quest once that was the end of it.