BJJ has always intrigued me, but it almost assumes you're only fighting 1 person, otherwise, you take him down while his buddy keeps kicking you. Not good.

I like Tae Kwon Do, but it's better at a distance, and is really a young man's game. I have some arthritis setting in my hip, and high kicks really aggravate it.

Whatever Steven Seagal practices (Aikido?) looks interesting. I like that you can use it to control someone without necessarily having to punch or kick his lights out. I also like that you can use it in tight situations, like a bar or crowded room.