I just love BJ's. It might be the food, the drinks, and the entire atmosphere, but I adore it. The restaurant is usually full at every location, so it doesn't hurt to make a reservation.
The Ahi Poke dish is my favorite and that Cheeseburger Pizza really tastes like a burger! The pizookie is super good, I suggest the macadamia one if you like sweets that are not -too- sugary!
If you're on a budget, try their lunch menu M-F @ 12-3 pm. I think you'll find that BJ's is better than your average restaurant :)