Its funny, you bounce them and bounce them, and then one day it just clicks. All of a sudden you don't bounce anymore and you wonder what is different. As mentioned , it probably is speed. I find that some planes like wheel landings and some like three point. I prefer wheel landings myself. I hold it off and hold it off and pretent I'm going to three point. And then at the last second I let go of the elevator and bingo, a wheel landing. Some tail draggers actually land prettier in a slip, but it sounds a little early to go there. For now, just stick with it, and it will happen.