There are so many anime I would love to be in with so many different anime characters but right now I'll go with Pokemon..to be specific the Isshu region with Iris!
Samurai Champloo, because I'd love to be a samurai, without having to deal with powers, like in Bleach, FMA or One Piece. I feel like Samurai Champloo is a slightly less-exaggerated version of Bleach, and is shorter, plus the producer/writer as Cowboy Bebop. If not that, then I'd spend a day in the Cowboy Bebop universe. XD
Pokemon; I'd take Misty's life for 3 reasons:
#1: I'd LOVE to be a Pokemon trainer.
#2: I've always wanted a sister, and three sisters would be amazing.
#3: I love water so I could LIVE in their gym.