What is your reason behind wanting to do martial arts? Exercise, self defense, competition, etc?
If it's either of the first 2, then pretty much any style will suit your needs. If you want to compete, then you'd have to look around to find the competitions near you and see what style they were...I think most common competitions are karate.
I did some Go Ju Ru (Okinawan Karate) when I was younger and I thought it was great. Part of my instruction was the standing group instruction like you see on TV, but the other part was practical application and grappling (ground fighting). That way, when it came time to really have to fight, I knew more than just the basics.
My son has been in ATA for many years, and was a World Champion for a couple of years back in the 90's. He likes it, and there are lots of ATA schools and competitions around. He is career military, and it keeps him in good shape. The picture below was taken a couple of months ago and he is 42 years old, so stays in good shape.
I can't make a recommendation as I am not into martial arts, but am just passing on some information...
I did tae kwon do for while, but never loved it. Many females in class were very nasty and violated rules all the time so it was pure dangerous to pair with them (most males were really good to work with though). I also took self-defense classes (with the guy with black belt in karate) and those were awesome. Indeed taught a lot and lots of fun.
If you are looking purely for self defense check out Krav Maga.
There are no competions or levels due to the extreme violence and danger to combatants.
It is the only form of martial arts not a form of excersise.
It is taught in Israel to special forces and the military. Shalom
My brother and sister loved taikwondo and it looked incredibly fun to me, as well as very good for self defence - but whatever martial arts discipline you choose, go to an instructor who teaches the whole philosophy, not just the moves.
Wing chun or also known as Wing Tsun. I have been learning Karate but I think Wing chun very direct. If your looking for self defense on a real level then Wing chun is the way to go. Even starting on basic levels its very very effective.
BTW can't use Wing chun for sports as it not that kinda of martial art too do so as it's direct and get your attack on the floor!