Being too light... does that mean I should bring the nose more forward?
the other way. to make the kite 'heavier' push the nose back a bit. more air will spill over the leading edge instead of being directed down the sail.
generally speaking the kite will be slower to accelerate from a stall to forward flight but once in forward flight will give better feedback on the lines of what the wind and kite are doing. when you do stall the kite (like in your side slides), you'll have to give up less ground to keep the kite stalled.
setting the nose light can help in really light wind where the kite simply won't fly without you pumping it. with each pump you'll get more altitude, but the trade off is the kite relies more on your input for forward motion, than the wind. so it's easier to get it flying, but harder to keep it flying.
just how light or heavy you choose to set a kite is dependent on personal preference and flying style.
of course this is just my opinion and observation. your mileage may vary, as they say. hopefully someone will chime in and either agree or disagree, but if so elaborate why. more experienced voices always result in greater wisdom.
