Christi was a slow burner for me.
I hated her to start with. I still think her timing is off - like when Maddie and Mackenzie had won and christi kicked off and it ended with Melissa storming out and all three girls (Chloe, Maddie, Mackenzie) sobbing 
However I'm not a stalker Christi was a bit set up with Dance Moms. For one thing, Chloe and Maddie were pretty much equal before the start of the series but the show set it up to look like Chloe wasn't as good as Maddie. For instance, in episode 2 Chloe won in the 9-11 age category and Maddie won in the 8 and under but the episode made it look like Maddie won and Chloe lost.
By series 3, Abby's treatment of Chloe had got pretty bad - she was still fairly 'human' in 1 and 2. She definitely gave her sub standard choreography and genres she wasn't as confident in such as the hip hop solo, and when she DID win took it away from her.
Christi is just too impulsive. She jumps in with her mouth before thinking, but I think the heart is there.
I've actually got a soft spot for all the moms. I admire Melissa's devotion, christi's heart and her humour is to die for - I still can't think of the episode with Black patsy without laughing - Jill is very gentle in her way, I like Kelly as well - she is spoilt but she really loves her girls and tries to do right by them. Holly I have a lot of respect for although she sometimes misses the mark. I don't like it when Christi and Kelly mock Abby's weight though.
The one I'm not really warming to is Kalani's mom but I'm a bit biased, as she was awful in AUDC. So was Asia's mom but Asia was a strange little girl. I even liked Sophia Luca's mom!