On this note.
While I have access to wonderful aoe enmity moves as a Warrior, when it's just one or two enemies, I mostly single target AOE, with the occasional Overpower thrown in, the frequency of which varies depends on the party make-up. In conjunction with target marking, this works well, since it allows the party to focus DPS and start picking off targets more quickly than a haphazard approach would.
But, then, you get BLM's that just want to flare or aoe all the things, or single targeters that ignore kill orders.
That's when life as a WAR tank gets interesting. It only turns frustrating when you point this out to other players, and they respond that you're only there to spam overpower. XD
Pro-tip: Over relying on Overpower actually makes dungeons longer, since you'll run out of TP more frequently and wait longer for refills.