Potential re-steal situations have a lot to do with reads, image, and table dynamics. How often had you been raising? How often had the table been raising Villain's blind? Had you seen him defend it before? Had you ever folded to a re-raise? I usually don't assume re-steal the first time I get played back at, even if I've been aggressive. The "standard" play is to wait for a big hand and then re-raise the aggressive player, not to come over the top with air. AJ is more than good enough to make a stand if your raises haven't been getting respect, but if you are used to taking down the blinds, then I'd let this one go.