advice...if you were to start again!

[MMA]

do it for fun and not for a street fight and you will find that you will learn a lot more and enjoy your experience.

Muay Thai
Judo
Jiu Jitsu

do it for fun and dont worry about fighting.

good selections. but i would only recomend brazilian jiu jitsu, a lot of traditional japanese jiu jitsu takes a very long time to be effective with.

i also recomend sambo. boxing is good, but a little tough to start at 32. you'll be in a gym geared to much younger guys looking to compete. the other schools will have more people closer to your age, with similar goals.

the best place, if available, is an MMA school. Mixed Martial Arts has taken the best techniques from all the other arts, and put them together. the result is nothing short of devestating, the most effective form of fighting ever devised by man. if there is a place available, train there. the only drawbacks are that these places can be a little rough and intense, but if you can handle that, you might as well start at the top.

go to the martial arts forums, mma.tv and sherdog.com. make a post asking about quality schools in your area. someone from your area will answer and let you know. this may also let you "meet" someone from the school b4 you go.