I'm really curious to see the replies from this topic. I have been away for almost 10 years and trying to decide what to train in now that I'm in my early 40s.
43.....I don't practice a "style" anymore per se but I train RBSD with a Systema approach. It is effective and much easier on the body and old injuries. I would call it Kyusho, Thai Boxing and Silat rolled into a Systema burrito
I am 42 and I train in Tibetan White Crane kung fu. While that is the only system that I train anymore, I did have the fortune to train in a number of other systems over the years, starting when I was 13. White Crane simply made the most sense to me so I stopped spending time on anything else.