Sorry I have not posted much, I have been reading the back and forth about punching and enjoying it. Looking at my father, he does infact have a default kick he uses. I noticed when I turn a corner in his home, or some how unexpectedly run into him some where, his startle response involves a front snap kick. He will go into what I can only guess is the TKD back stance, with all his weight on his rear leg, his arms come up into what looks like a Karate X block in front of his chest and his lead leg comes up and into position for the front snap kick. Its almost like he brings his front leg up to the chamber position of the kick.
He should probably cut back on the caffeine.
I have pretty much ruled out any kicks that involve jumping, no need for that kind of risk, not that I could do them anyways. That leaves all the terrestrial kicks, the basic ones mentioned the front(both flavors) the side and round. All of which I have in my arsenal and can use proficiently in low line kicks. That leaves the other 2 kicks, the back kick and the hook kick. Are these of any consideration? I have seen a lot of people hook kick and fall over when impacting, which is bad for self defense usage. The back kick, seems like a less risky kick, tho it does turn your back to the enemy, but it hits like a brick.
Since you mentioned TKD I am going to assume that you mean the TKD style hook kicks and back kicks. The hook kick id primarily designed to hit a target that moves after you hit it such as the head or in some cases the legs, it rely's on being able to follow through the target. When you try to hit a solid target such as the body and don't have enough momentum to follow through you get rebound which can knock you on your butt if you can not compensate for it so it is not recommended to use it in that fashion. It makes a good sweep for the legs, you could also hook the leg as you sweep it. Although kicking to the head is not usually a good idea for self defence as it leaves your groin vulnerable the hook kick is probably one of the fastest kicks around in terms of foot velocity and if you are good or lucky enough to land one fully it can be a fight ender. I once knocked somebody out during his black belt grading with a hook kick and it only clipped him (he was alright soon after and passed). If you are going to use a hook kick it is better to use the heel than the ball of the foot. The back kick does leave you a little more vulnerable as you have to turn your back on the opponent but that can be mitigated a bit if you distract them with a strike before you turn around or use it after round or side kick. It is also useful if your opponent has gotten around to your back at kicking range, for example after they have blocked your side kick or the back of your leg or moved back away from your round kick and you have over-rotated it may be easier to turn around rather than step across. The back kick is arguably one of the most powerful kicks there is. All kicks and attacking movements leave you vulnerable to some extent you just have to do what you can do when the time is right. As for jumping kicks they are very risky but they could have some uses such as if you have to help someone who is getting attacked and you run to help them you can suddenly jump and kick them rather than stop first to do something else. Or if you were getting chased by a guy and his friend jumps out in front of you to stop you then you could suddenly jump and kick him without slowing down much. So jumping kicks could still be useful but you it is very likely that you will get much of a chance to use them.