i dont really know much about kung fu karate is very rigid as people have said.. it uses strong movements with strong grounding. styles such as seido utilise momentum to string attacks together. saying "dont do taekwondo unless your under 17" is a really strange statement. i dont see how a 14 year old would know how easy/hard it is for people over 17 in relation to flexibility. im almost 19 (though not too far out of that bracket) and i can tell you, there are no issues with flexibility (there are many many amazingly flexible older students in the organisation - general choi hong hi would perform high twisting kicks in his seventies). anyway flexibility is something that is developed and is not even 100% necessary - one of the best sparrers i know (in ITFNZ around our area) is actually not all that flexible, and uses alot more punches and lower kicks. with taekwondo you should find out whether the club is more traditional based or sport based. ITF is the original taekwondo (formerly KTA) designed by general choi hong hi and adapts techniques from shotokan karate and other arts, as well as choi's own knowledge and analysis. It is what you would call more 'traditional' in style. ITF and other traditional styles of taekwondo do not conform to the normal taekwondo stereotype in that they are not overly focused on high and flying kicks, but use punching more extensively, also incorporating throwing & joint locks (particularly in self defence curriculum - alot drawn from aikido and karate). sport tkd is what youd see at the olympics (WTF), you can pass your own judgement on that. Sport TKD dojangs (often spin off's from WTF) are often unfortunately more 'Mcdojo' like. hope this helps