Everyone wants a six pack, and every girl wants a guy with a six pack. This is totally true, and I won't tell you it isn't. I have been totally shredded, by average guy standards, I'm sure some body builders would disagree. However, I always pulled harder with dad bod and nice arms and shoulders. This means your shirt should be snug through the chest and shoulder and drape over your stomach, being fat isn't the same as dad bod, be honest with yourself. If you can have both, by all means do it, but if you only have enough motivation for one, always go for arms and shoulders.