I'm guilty of weighing and measuring fish as a way to assess my angling success. Perhaps you too have "personal best" records. Then I got to thinking... Is a 10 lb bass that just ate a 1/2 lb trout bigger because it now weighs 10.5 lbs? Is a fish full of roe bigger because it weighs more that it would after the spawn? Is there such as thing a "true" weight? Average weight? See where I'm going - the same fish can have many different weights at different times.
In the tournament bass fishing world it is all weight. That's fair since everyone is working under the same rules.
How about you - how do you measure angling success?