Making chubby sound cheerful and positive is poor incentive if you really want to lose weight. It's a bad strategy.
I don't think there's much danger in our culture of anyone going overboard with thinking "chubby" is cheerful and positive, whatever name we apply to it. We are bombarded with reminders that fat does not equal cute. But, paradoxically, I think it's easier to lose weight when you feel better about yourself.
Some of my most horrendous eating has occurred when I was mortified about my weight, and therefore feeling depressed and worthless and hopeless. I would overeat either 1) to feel better, because food will lift your mood for at least as long as it's in your mouth and 2) to punish myself for being overweight.
But when I feel good about myself, I don't crave the extra mood booster of food. And the feeling of strength that comes from higher self-esteem gives me the energy and positive attitude to help me make better food and exercise choices.
So sure, I'm chubbilicious! And if I drop a few pounds, I'll be 'licious.