I didn't get too far into progressive rock beyond ELP and perhaps what perhaps the likes of Uriah Heep may have contributed to that genre. I do get the Focus reference, though. Around that time, Judas Priest, AC/DC, Kansas and a bunch of other hard rock/pop bands kind of took over my music life for years. During the '80s, MTV made me go more underground away from mainstream pretty much entirely and I ended up following electric blues and the guitar virtuosos of the time.
Fact is, I didn't really get progressive rock or jazz or what it was trying to do, musically, and stuck to the more crude and simple melodic stuff.