I suppose it could've changed every season to keep everyone guessing. Uploading the title sequence with the music switched was actually a trend for a while. Elton John's "Rocket Man", Tasmin Archer's "Sleeping Satellite", Moody Blues out there somewhere... taking something from 70's/80's TV that had a whiff of cheese. I think "Faith of the Heart" was fine. In the first couple of years anyhow. It doesn't fit in a season-long theme about saving Earth from the Xindi. All it maybe needed was a female voice to make it much more different to Russell Watson taking over from Rod Stewart. A bit more bittersweet with the inspirational. Somebody strong and in at the time. Not so middle of the road. Metal maybe like Evanescence. Their lead singer is ethereal, without going all the way to screaming TOS theme operatic.