[punkass]

I guess the question here is, "What do you want your opponents to do regarding your raise?"

If you wanted to win the pot preflop, you agree that it wasn't enough of a raise.

So your opponents aren't going to fold. Most likely, if they don't have a hand they love, they will call. This is the case that you wanted. In this scenario, your AK is most likely winning, unless they have a low-mid pocket pair.

IF they have a hand they love (regardless of whether it is a good hand or not), then they may reraise. Your $15 raise doesn't really show much strength, and a decent raise to $75 is a raise you probably can't call.

Side note: To an advanced player, your small reraise screams AK. Would you do this if you had KK?