Boiled chicken is the healthiest way to consume it. It prevents adding on any additional fats which might happen during the process of further cooking the chicken. However boiled chicken becomes very bland and tasteless if you are eating it regularly. I generally cycle through a number of recipes in order to make it less boring. There are a number of healthy chicken recipes available over the internet.
However your body building goals will actually help you determine how you want to eat it. If you want to avoid fat at all costs then have it boiled. If you are in the gaining phase you can add the chicken to some whole wheat pasta and have it. Along with the way to eat, the timing and the amount of chicken you are eating will also play an important role.
I agree boiled chicken is the easiest, less fat and sodium! I do put a little seasoning on but it can get bland. I don't do chipotle everyday! Hey thanks for the comment :)