Are you just looking for staying healthy or do you have self defense in mind? Have you considered giving Judo or Wrestling a shot? I ask, because Aikido is great if you're curious or just looking to stay active, but if you're looking to martial arts with the additional goal of finding a style that is practical and effective for self defense, competitive sports, etc., Judo and Wrestling benefit both from having not only a more cohesive and straightforward vocabulary of techniques, but the additional ability to practice competitively also allows you to develop familiarity and confidence in both the techniques as well as your own body. You live a lot closer to the region than I do, so while it was never an option for me, Sambo might be worth looking into as well, for the same reasons stated above. Personally, I did Karate growing up, a little Judo in college, and finally Boxing as an adult, but that was disastrously short lived, which is a shame because I fell in love with it. If I had a chance to do it all over again, I would have stuck with Judo. Also, this goes without saying, but please don't fight fight. We're all too good for that. :)Aikido
Mostly self-confidence and it's a decent group activity. I hadn't worked out with other people in quite a long while. My choice of aikido was predicated on already having some exposure to it and not hating it. The 'landing on the floor' part was a bit tongue-in-cheek, though it does begin to feel samey despite the fact I know it's one of the pillars of this high-mobility sport. Time will tell. Judo isn't taught anywhere where I'd be willing to commute after work, and that goes quintuple for wrestling. Sambo is viable, there's even a place for it close to where I TA, but I'd rather stick to what I have now rather than switch one intro for another. Really, I think that part of the problem is that I'm not passionate about it. My last homework gave me more of a rush than any martial art or fight done so far, so it's a bit hollow but better than not doing anything.