1) I prefer dancing to football, because I am a girl and I am not interested in this sport. As for dancing, I find it exciting and I like doing it.
2) I prefer badminton to tennis, because tennis is much harder. As for badminton, it is hard too, but you don't have to run as much as you do while doing tennis.
3) I prefer aerobics to hockey, because you're always cold. As for aerobics, I like keeping physically fit.
4) I prefer chess to windserfing, because it is not so interesting. As for chess, it helps you to develop your brain skills.
5) I prefer skiing to rugby, because this sport is a dangerous one. As for skiing, I find it safer.
6) I prefer gymnastics to kickboxing, because I don't want to be kicked by someone. As for gymnastics, I like it best, plus, you have less chances to be kicked.
Вот кое-как получилось :)