I will tell you why I love aikido and let you draw your own conclusions about how it might differ from other arts.
-- positive, fun, physical interaction with great people
-- whole-body work-out, makes me feel centered, strong, and limber
-- changes the way I interact with the world (vague, I know. you'll just have to experience it for yourself)
-- martial without being agressive, ie. we train hard but not mean
-- it is beautiful
-- potential self-defense
now get out there and train!