My dad was a big Arena Rock and Prog Rock guy: bands like Kansas, REO Speedwagon, and ELO — but also Styx, Jethro Tull, Emerson, Lake and Palmer.
My dad was also a fan of Cheap Trick, but they’re from my hometown and had a pretty big footprint there.
Later, my dad got more into Country music but his old record collection was all of this kind of classic rock.