Think of the reasons why you slowplay, you want you ops to make a second best hand that they would be willing to go broke with (TPTK etc.) without them getting a hand better than yours.

What card could come on the turn that would give you more action then on the flop?

Also AJ/AQ/QJ even J9 are hands people like to take into raised pots, all these hands are either 1 or 2 cards off a straight.

I'd reraise pre flop and on the flop, the earlier you build a pot the easyer it is to stack someone later. Next time you get a high PP (or a set) think "I'm going to aggressively stack someone or win a tiny pot". You win less mediun sized pots, but you lose less, and win more, huge pots.