Yeah, I think my gaming group way back when was similar. Probably 2/3rds was D&D, then some Champions, then maybe 10% was a bunch of other things. Chaosium's Call of Cthulhu. TSR's Boot Hill. I think we tried Fantasy Games Unlimited's Bushido after seeing Seven Samurai for the first time. Except for a brief foray into TSR's Gamma World, we didn't play much sci-fi either. I always kind of wanted to, but it never really happened. This was before so many of the great space opera tv shows came out, so maybe we were just stumped for inspiration. We were watching ST: TNG at the time, but DS-9 hadn't come out yet. Then you had Babylon-5, Farscape, BSG 2004 and The Expanse, so there's a ton of material out there now.
Gosh, I'd forgotten about Palladium games. I don't remember ever playing Heroes, but we tried Beyond the Supernatural. I think we were interested in another horror game after Chaosium's Cthulhu. And I think we incorporated elements of TMNT because I remember playing a character who was some kind of "man & animal" hybrid.