I took Tae Kwon Do for a little while about a year or so ago, up until the school closed. I only made it to Green belt, so I won't pretend any expertise in the subject. I can assure you that you're going to discover a number of interesting new muscles you didn't know you had! Hapkido has always intrigued me, though I don't know of anyone locally who teaches it.
I've been playing off and on (mostly on) with Tomiki Aikido for about the past ten years, and I'm currently getting ready to take my second degree Black Belt test. If I had to offer one word of caution, it would be this: learn to fall properly! We Aikido practitioners spend a lot of time learning to fall - not because we expect to fall per say, but because we have to practice throwing one another - and it amazed me how poorly equipped most Tae Kwon Do practitioners were to handle even a moderately hard fall...and I'm talking Brown Belt and Black Belt level. Statistically, most fights end up on the ground sooner or later, and so it behooves all martial artists to familiarize themselves with this vital skill. If your Sa Bum teaches falling techniques, consider yourself lucky to have found a realist. The most beautiful Tolyo Chagee (Roundhouse) kick in the world won't do you a bit of good if your opponent manages to sweep your support foot and you knock yourself unconscious hitting the pavement! <img src="images/graemlins/blush.gif" alt="" />
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It's later than you think...