I think his aggressive nature is up to the person, but I do think it prevents the ball from wobbling off line a bit better.
I agree on there being different types of people...
Obviously you want optimum as far as GOLF strategy, mechanics, etc. (behavioural tendencies aside) go but to me I think individual tendencies should be understood as well.
Two golfers of similar handicap, with putting strokes that are basically the same:
One darts around, is very assertive, more dominant, talks fast and perhaps bluntly, is more on task, less patient, bottom-line/goal oriented, "wants it in the hole" (bottom line), etc. etc.
The other is easygoing, more rhythmic and smooth, more patient and careful, not in a rush, does things slower and more deliberately, perhaps is more into safety and being comfortable/consistent/steady, just wants to "make a good stroke and ease it down there", etc. etc.
I know who I am picking to be a little heavy handed...and who is apt to feather it a little...
But those would just be tendencies.
Like I said, regardless of who I am...I am still trying to optomize. Part of that probably should be an understanding of self though.