there is no superior martial art like has been mentioned above,
i reall cant tell you what martial art you would be good at, it would be best off to go with what you enjoy doing. i practice kung fu and tai chi because i enjoy them, so go and look for a dojo or class in something like a leasure or speorts center near you, there is almost definatley going to be one, so go allong and get stuck in, nothing more to it.
we cant tell you that you will be good at e.g karate, only you can choose which one you are better for. so you yourself need to go out and experiance the martial art first hand.
if you whant to get into mma, then go to an mma class, there will shurley ne one in your local sports center, just google or yahoo search 'mixed martial arts' clubs in your aria e.g new london. and your sorted.