Ushiro Sensei was at the Expos and did a great job of showing how aiki karate could be.
I would suggest any style of karate that teaches you to punch realistically so we can train better.
For those who can do so, Ushiro Sensei will be in the US two times this year. There are still spaces available for his seminar at my school on May 15 & 16. For more information please go to my events page on my website.
I apologize in advance for this shameless promotional post