Bleach

It's about a 15 year old boy named Kurosaki Ichigo who has ability to see and talk to ghosts and spirits. One night he's able to see a strange girl named Kuchiki Rukia who happen to be a Death God (known as Shinigami in Japanese) to search for hollows. Hollows are soul eating spirits, it is a job for Shinigami to defeat them and leading them back to Soul Society (sort of like heaven). In order to save his family and friends lives, Rukia transfers her Shinigami power to Ichigo. And so the adventure is begin and if you like Yu Yu Hakusho, you probably like this one as well. The series still goes on (about 177 episodes) and it already has 2 movies. I recommend this for teens and adults to watch.