Terra, don't you actually want to learn some offense too? Isn't Aikido just about counters and nothing else?

I'm trying to decide on a martial art to take up. I've already reached brown belt in Rhee Tae Kwon Do, but I'm a bit bored with it. I want to do something a little out of the ordinary instead of all the famous popular ones like Karate and Judo. I'd like a combination of defense and offense. Any suggestions?