Cyberpunk is one of my favorite themes, and quality cyberpunk videogames are rare. I want mod support if only to extend replay-ability. Because in my experience, this is going to have be my cyberpunk videogame fix for years to come.
I only need this to be better than the Deus Ex series because I desperately need a replacement for that. As far as I can tell, exploration, stealth or alternate level paths do not overly revolve around crawling on air ducts, so it's already an improvement.