It's always nice to see him shoot a big load. I don't think it's really any kind of affirmation. It's more of a kink thing. He loves to cum on my face, and I think it would be a little silly for him to do that if he only dribbled a few drops. What would the point be? But again, it's not really a big deal. I wouldn't care any more or less if he had a weak load. I just probably wouldn't let him cum on my face.
If one is using his hand to finish himself off, a guy can restrict the urethral opening and cause the ejaculate to 'shoot' further which may be more satisfying if that is what one of you is into. The narrower the urethra, the more it will 'shoot'.
I find that it varies. I don't think that I guy can be strictly a "shooter" or a "dribbler", since things like the method of stimulation, personal health, and duration of abstinence can each contribute significantly.