I would definitely say that how successful you can be by playing aggressive is directly related to how well you can identify the other players' patterns, and how well you can identify the texture of the board. There are times when you definitely don't want to c-bet, because you already know you're probably beat. However, in order to get further into a tourney, particular into the later stages, it is essential to take (and of course win) a few coinflips. The key is to make sure those coinflips are when you want to take them, on your terms.
In other words, you will have to go all-in at some point or another, and most likely at or near the bubble. Just be sure you're going AI when you want to; in other words, you be the one pushing, not the one calling. Make sure that you're pushing when you have identified weakness at the table, when you think you can make the other players fold, and when you think that even if you're called you'll at least have a decent shot at winning. Of course, it will get to a point where you will just have to pick a spot and shove, regardless of your cards.
Lets say you're nearing the bubble, but are already down to 10xBB stack or less. You get one limper and the rest fold around to you on the button, with more or less mid-stack but tight players in the blinds. Unless you've seen this guy limp in with monsters before hoping to get action, its a good spot to shove, even with a marginal hand, or even rags if the blind level is about to go up again, leaving you even more shortstacked. Why? Because you might just take it down right there if the other players are playing scared, and in the worst of cases, you double up, increasing your chances of not only making the money, but making it deeper into the tourney.
Its hard, but over the long run I can guarantee you will profit more. You may not win or make the money every time; in fact you will likely bust out at the bubble a great deal of times. But you will be more likely to make it deep into the money when you finally do make the money, because you're not just sneaking your way into the money, you're charging towards the final table.
Hope that's helpful; best of luck to you!