1a : relaxed and casual in style or manner an easygoing boss. b : morally lax. 2 : unhurried, comfortable an easygoing pace.
Is easy going positive or negative?
It can be used positively or negatively depending on whether the person saying it approves or disapproves of the person they are describing. In my personal experience, more people use the second definition. I would assume it is positive unless you hear them say, "X is too easy going," then it is a negative.
Is it good to be easy going?
Easy-going is a desirable quality as well: Easy-going partners will adjust to your needs, let you make decisions, and be happy with what they have.