HU-NL raising conditions?

[12Motion]

I play lots of home games. We mostly play NL hold em tournies for 5 or 10 bucks. Very freqeuntly I get into a heads up no limit situation. What kind of hands should I be raising and how much? I am aware of the 3.5 times the big blind rule, but when should I bet diffrent? And what do I do if he bets first? What kind of hands are worth calling or re-raising if he acts first?

We both have 2,000 in chips and the blinds are 200-400. Thats pretty close.