For basic KISS stuff the new "Army Combatives" is pretty simple if only they would put some of the old stuff back in it in later levels. I also liked Aikido. I have wanted to get back in to it but haven't managed to make the time. I found that the biggest take away from it when I was much younger was the ability to remain calm in situations that left others tight and soon to be worn out. I haven't done much H2H compared to some but have always been good at retaining and applying different techniques... Good understanding of movement and body mechanics helps. I've seen people bad mouth all Martial Arts just because THEY couldn't make it work. All they needed to learn was to LET it work. My 02c anyway...