My experience with Palladium RIFTS echoes a lot of what everyone else said - a lot of cool ideas, but if there was an execution it was kinda messy and a bit overhanded. But the world was still fun in that crazy "anything and everything" kind of way. Magic and technology and demons and cyberware and trolls and dinosaurs and portals and EVERYTHING!
I always thought there was a fun play experience in RIFTS waiting behind the kludgy system, and when Pinnacle released the licensed version of RIFTS for Savage Worlds I was all onboard. Here was a Fast! Furious! Fun! game system that really seemed like it could capture the gonzo possibilities of RIFTS without it becoming overwhelming. The result ... is actually a bit overwhelming. The best way to think about it is post-apocalyptic superheroes, but I needed a better hook. The Tomorrow Legion setting from the Savage RIFTS books didn't do anything for me. But darn it I wanted to try!
So I came up with a group of mercenaries out of the Colorado Baronies to track down some vampires in the Mexican vampire kingdoms. Ciudad Juarez is a cool city right on the border, where the propaganda team has declared "no vampires here!" I built the PCs based on miniatures I had, which included a lot of the older Wizkids Star Wars minis along with some fun Reaper sci fi figs. The PCs included an armored dinokin (ankylosaurus) heavy weapons specialist with a rocket launcher, a sasquatch vampire hunter, an African ley line walker escapee from the Phoenix Kingdom, a mind melter refugee from the siege of Tolkeen, a were-ocelot thief hunting down aberrations, and a former Coalition State spec op soldier. I set it up with a whole table of terrain representing vampires, gangers, and police in a section of Ciudad Juarez, grabbed some players, and made a session of it.
It was a blast! Literally. Grenades turned out to be the winner overall but everyone had fun and I'm expanding the session to include further hunts into the vampire kingdoms of Mexico. I'm going to run it for conventions as well in the After Times.
So for me the "fix" to actually play was to lean more into the setting and less the Glitter Boy aspects, but still push the gonzo boundaries of what's sane in a regular game. It's a total blast!