Seems logic that I go first My number one Jovi opener will have to be Raise Your Hands. Not because I think it's the best song of the bunch, far from, but with an energetic Jon in good shape it's just the ultimate opener. It gets the crowd going with the hands-in-the-air ritual as well as the lyrics making sense. With Jon being able to slip in the name of the city during the last chorus is pretty awesome.

Notable mentions goes to I Believe and One Wild Night. I Believe is in some sense my favorte, but it's not as easy accessible like Raise Your Hands.
One Wild Night is pretty much like Raise Your Hands with the lyrical theme fitting the opening slot and a chorus that were written for a live show. Loved the band coming out of the empire state building kicking of with OWN in 2001.