David spent most of his time finding some way to annoy the people around him. However, there were a few who recognized him for his potential, humor, and skill.
He was well-renowned for his abilities in system programming: creating his own IRCd, working with select architectures such as ARM and x86, and generally his expertise in shellcode and C. He was more 'curious' than a hacker: he never meant harm to anyone, although there were quite a few cases where he was nearly caught up. His character is however the most memorable--you either loved him or hated him.
In the end, though, being his friend would’ve changed anyone’s life. It was absolutely a gift to meet him--someone to never forget.
An excerpt from his mother:
“David was truly one of a kind, and has left an indelible impression on all who knew him. He drove almost all of us to distraction at one time or another (and me, much of the time), but we loved him dearly...”.