What is the best exercise?

I have reasons why i want to lose some of my weight about 5 kg or so. I dont want to waste money on fitnes, because im pretty skimpy... i do dance for at least one hours a day, but it is my routine already so i guess its not effective... i want to do something beside it. So im torn, should i do yoga, pilates, or is there something else. I have been doing pilates for a year and a half, and i want something new. I dont want it only to lose weight but i want it as a hobby Too.
What is the best exercise?
Post Opinion