Flaring is about matching attitude or angle of attack with sink rate to maintain lift whilst keeping the nose above the ground for a safe landing. A firm touchdown is not bad or a light one good necessarily... it depends on things like, mass, head, tail or cross wind, speed and of course skill experience and aircraft type. More complex type tend to glide less well. Flying in ground effect is easier in some aircraft than others. Stall speeds vary too. On an FI flight test an examniner criticised a recent instructor for landing with power on "for extra control" because he demonstrated that he was compensating for a lack of technique! As you fly more you will feel more and then probably understand more of what it takes to make a consistently good landing. There are so many factors that contribute. A good approach is a good start. Situational awareness being a critical factor. Hope this helps?? In short keep the nose up! don't be too fast and when competent use the highest flap setting for the conditions. Good luck!