In Wing chun we have a pretty upright position with the body weight being more or less 60/40 (60 on the back leg), that is for combat, in training we are more like 90/10 to be sure we get strong legs to have good rooting even on one leg. This allows the front leg to be very quick and unpredictable. We often use the leg to counter kicks so it has to come out very fast, no time to switch body weight. This also helps countering attacks to your lead leg. I don't think I would try a roundhouse with my lead though :s, but would gladly set it up with a nice little teep kick first from lead, then roundhouse from back. (we don't practice roundhouse in WC training anyway, I got that from previous "shaolin" training. But if you want strong roundhouses, check out Muay Thai's). Punches come out quicker than kicks, and less risky. I agree with WC philosophy to keep kicks below waistline, knees are much more practical targets than faces. [edit:] I wish I could take kickboxing, but WC punches are just so different than anything I've ever seen, it would totally mess me up .