The success of Hercules: The Legendary Journeys led to an inevitable spin-off that ultimately became just as popular as the parent series, if not more so.
Xena, Warrior Princess premiered in 1995 after Xena (Lucy Lawless) had appeared in 3 episodes of Hercules. The story is that Xena was supposed to be killed off after her 3rd appearance, but she'd already become a fan favorite, such that the spin-off was warranted.
There has been a great deal of debate over whether or not Xena and her partner-in-peril, Gabrielle (Renee O'Connor), were carrying on a lesbian relationship during the course of the series. While we can't really say for sure, Xena did become a very popular show with the LGBT community. Not sure if Viacom's Logo, which serves the LGBT community, has ever acquired the rights to the series. You'd think they would've by now.
Towards the end of the series, as was the case with Hercules, Xena drifted into camp adventure and comedy. I'd stopped watching the series by that point. Just wasn't interested anymore, that's all.
Recently, it's been reported that NBC is looking at reviving Xena for next year, with original producers Robert Tapert and Sam Raimi already attached, and Lawless has expressed interest in participating.
Xena's weapon of choice, a chakram that doubles as her necklace, might've been inspired by the 70's Wonder Woman series, in which the Amazing Amazon (Lynda Carter) often used her tiara like a chakram or boomerang. Similarly, Jana of the Jungle, an animated series that aired in 1978, had its titular heroine wearing a chakram/necklace as well.
Here's a 1st season intro:
The only reason I can think of for NBC rebooting Xena would be to grab an extra piece of the genre pie, as one online writer already suggested that Xena would be coupled with Grimm on Fridays, where Constantine and others have failed the last 4 seasons. I disagree with this logic. Since Xena is technically a superhero in the mold of Wonder Woman, using the revival as counter-programming to any of the comic book series currently on the air (i.e. Arrow, Walking Dead, Flash) makes more sense, and isn't as much of a risk.