I love her. Not in the same way I love Krystle of course, but she had this uncanny talent of bringing out the worst in Sable, and the funny thing is that she never meant to do it.
Sable mentions (was it in the very first episode?) that she's always been jealous of her sister and it's easy to see why: Frankie never had to cultivate her life or image, she never had to make an effort.
And then, on top of everything, she effortlessly takes everything away from Sable. And not even because she
wants it so badly.
Alexis could justify her home-wrecking shenanigans because she was a sociopath, Frankie could justify it because she was completely ignorant. Oddly enough, much of that clueless characterization spilled over in Katharine Ross' performance, and that's why I consider her the best-worst casting choice.
It shouldn't work, but it does. It certainly does for Sable and the many frustrating situations she finds herself in, time after time - and despite her relentless scheming and plotting.
It's so much more fun than the banal bitch vs. bitch in Dynasty's season 9 (although they had some great moments, too).
Maybe I'm a weird person but I just don't understand that other fans don't see how much disliked characters like Frankie, Chase Gioberti and Diana Fairgate have contributed to all the drama. Not because they were "sexy" or "fabulous" or "formidable" but simply because they were there.
And "being there" in a soap usually means "being there at the wrong time in the wrong place, and in company of the wrong sister".