Everything you did or do in life affects every aspect of your music (and everything else actually).
Lets say someone as been a fisher man and worked is butt off since very young.
There's a good chance that the fellaw as very strong hands and maybe less agile and precise then a magician that make cards and coins trick for a living.
Quick comparison - Stevie Ray Vaughan's big paws and Eric Johnson's tiny precise fingers. Both very good but very different.
Someone who is arrogant and aggressive might sound "punchy" and "bangy" .
Someone who is quiet, calm and patient might sound a bit more mellower and reserved.
Quick comparison - Ted Nugent's and George Harrison's.
One is punchy and it sounds like that in his music and the other was more zen and quiet and it also shows in his music.
Now there's a hell lot more to what makes someone sound one way or another then what I just mentionned and it's a lot more "complicated" then that but I think it's a major factor.