Although, come to think of it, since most of these characters take seemingly deadly attacks from giant monsters and barely get damaged, maybe their physical abilities are so far beyond normal humans that it changes what type of armor is "practical".
For example, if they are much stronger than a real world human, heavier armor becomes practical.
If they are much more resistant to damage, skimpy armor becomes more practical.
Or, conversely, if the enemy is so strong that their attack would cut right through any "practical armor", it wouldn't even matter.