To try to answer your question about Hapkido. Yes it does have it's similarities with Aikido, but Hapkido is more aggressive than Aikido. There are so many joint locks, arm bars, throws(from the wrist,clothes,and hip), and defenses from nearly every attack that you can imagine. And it is not Taekwondo with wrist locks. Every technique is designed to break a bone or cause serious pain . There is also a lot of internal arts and healing taught. Becareful when choosing a school, there are places that say Hapkido but they are not. I am fortunate to have a Grandmaster who trained under Young Sol Choi and with Han Ji Jae . Good luck and if you can pick up the book HApkido by Marc Tedeschi. Great book on Hapkido . I almost forgot to mention the pressure points and weapon defenses. I have my first degree black belt and there is nothing like it.