I've been in your situation. The difference is subtle but pervasive. What do I mean by that? It affects who you are for the better, but it won't change everything in your life. Unrealistic expectation is the assassin of dreams. Also, having the boys/ladies drool over you is pretty good for the ego.
You've probably heard all of the standard arguments, but I think I've got a pretty good one, and it's pretty short, one word actually: respect.
In two parts (in order of least priority to greatest):
What other people think.
People can say what they want, but the fact that remains is being overweight is bad for your health. Being overweight sends a message to the world that you, the person who knows you best and therefore would know, don't think you're worth caring about. This is why society always has, and always will have a negative attitude towards those who are overweight.
What you think:
You can say that being overweight isn't really a problem for you, but deep down you know the truth. The fact is your body is your physical representation of who you are. Those who respect themselves make the effort to do the best they can with what they have.
You're the only real judge of what you're worth, but I prefer to think you're valuable.
