Depends on the tournament structure, I would only shove with AA or KK, but in all but the micros, you will get a call and when you do your usually looking at a chop and super rare times, your KK will get called with AA, so I usually just raise and go for value rather then shoving.
But at the micros, shove away, you'll often get called by a lesser hand. One time, first hand of micro MTT, the first hand, I was SB and folded to me I shoved with KK, and the BB called, my heart sank thinking he had AA, but the cards flipped and called with J4o...