I phoned Cindy Behr not so long ago. I remember watching her years ago on the channels and thinking she looked amazing but never had the balls to call. I told her I only had a few minutes with her and my word she did not disappoint

Very subjective as everyone will suggest the girls they have called, as it would be rare to not enjoy a call. 

Personally I have always had a good experience when I call but I tend towards really enthusiastic babes that feel like they are enjoying it too.

Good choices would be:

Atlanta
Jess West
Marni Moore

I would highly recommend calling Tanya Renai. She's intelligent, hilarious, empathetic and seductive. The sound of her voice is so beautiful and she can speak Spanish too. Taking her into a private cam session is an out of this world experience. She really appreciates being tipped and showered with compliments. The way her body reacts and the way she moans when she gets buzzed is so sexy. Her naughty shows on perv cam are absolutely incredible too. So ladies and gentlemen, please can you all financially support Tanya Renai as much as you possibly can.

Cool I have never call her Thanks for giving us all your opinion on Tanya always nice to hear which girls are worth giving a call too.
I would recommend at the moment Rhiannon Sarah I have only called her once and she is pretty new, but wasn't disappointed she pretty down to earth and takes requests and does them really well on the phone or something else. She even change clothes if you want her to wear something. She only done shows from home at the moment but if she keeps doing shows that I have seen she be worth a call.