Love this thread. You might as well ask how old are you and what kind of personality did you have as a kid
for me it was probably michael shrieve of santana. when i first saw his performance of "soul sacrifice" in the movie woodstock i was electrified! his playing heavily influenced me and still does to some extent.
Fore sure, I paid close attention to DS's playing on their debut album, things like Questions and Beginnings.
Perhaps Lars Ulrich. My first song was "Enter Sandman", so I assume it would be him.
I know for bass my influence was Cliff Burton.