Yeah, screwed up metabolism will not make you "happy" or even "stable" long term so careful. Remember that pdocs may throw around lines about "fat and happy" but would they look at fat girl thinking "but she's stable"? Probably not, sad but true...

if you are okay with the weight, then great... but please still do keep track on your physical health. Gaining weight for "no reason" is alarming because there's something going on with your body. If you are no happy with it... then look for other solutions, for they do exist. Do not others let you feel vain and shallow for this.