I feel your pain, but I don't see how the recommendations would change for blobby men. The only issue for blobby men following these recommendations is that it's really hard to achieve the desired results with off-the-shelf clothing.
For example: IMO, most big-bellied men shouldn't be tucking-in a dress shirt unless they're required to. A better-looking alternative would be to buy a dress shirt that's one size larger than what's needed and wear it untucked.
The problem I have with dress shirts - as someone who "shouldn't" tuck them in - is that by virtue of being dress shirts, they are longer because they are designed to be tucked in. Casual shirts are generally OK.
Plus, going a size larger doesn't hide my belly as much as I think it does.
As noted by another poster: I'm better off working on the belly than finding the right length shirts and debating tucked in vs out!
