Strategy: Blind Defense

[BobboFitos]

MIKE: I'm gonna raise. 1000 straight.
TEDDY: Very aggressive. A new day, and you won't be pushed around. But I reraise -- 5000

So, you're playing the typical rock garden .5/1 or 1/2 Pokerstars game, and as usual, it's folded around to the small blind. Now, this small blind is really irratating. Instead of folding and moving on to the next hand, he has a vengeful desire to win all your blinds!

So, he's very aggressive, and basically, wont be pushed around. (haha) So this guy constantly raises your blind 4x.

Questions being:
Now that the pot is heads up, and assuming you've both got ~100 BB stacks, what hands do you call? Raise? Fold?

I feel one of my leaks is I just let them have it far too often. I feel "out of my comfort zone," despite being in position, to an overly aggressive player when I'm holding mediocre cards. (Hands I wish I could keep the pot size down, but against someone who keeps hammering, a tough task indeed!)

I will post my thoughts later, but really interested in open commentary.