I don't begrudge others, Ben, but for me, from Day One, I was never really a "flag" guy. Maybe because it's because I liked other music - prog, the early alternative - as much as I did rock and metal. I loved Dio in Sabbath, because the lyrics were interesting. Some of his solo stuff, the "We Rock!" stuff, lost me. I'm a huge Twisted Sister fan, but I like the first two records best. The "I Wanna Rock!" stuff was joke-y to me. I preferred Maiden over Priest, because I dug "Rime Of The Ancient Mariner" and would rather hear that than "We are! Defenders of the faith!". I thought the "Mettle Maniacs!" stuff was silly. It was later, I know, but the best part of grunge was that they were playing Sabbath, essentially, without the stupid 80's metal get-ups (it didn't take hindsight for me to feel that Kiss looked ridiculous in '84).
There are exceptions; Michael Schenker had some lyrics like that. Kiss was borderline, but there's had a slightly different flavor (except when Paul did his "stand up for what you believe in!" schtick in concert.