There's two things you should know about your 330i:
1) Its one hell of a car - I've been looking at buying one for some time, and just waiting for the right one to come along (I thought I found it but the owner decided not to sell)
2) The automatic transmissions are a weak spot and expensive to fix. Looked after, you should have no probs, but I'd recommend not giving the gearbox too much hell, and definitely undertake good practise such as coming to a complete stop before changing between forward and reverse and vice versa. You should get many years trouble free from the box if you do.