I'm probably going to do Deus Ex next because it's rare to find highly rated cyberpunk in games and I feel it may be safe to say it will be shorter than KotOR. I'm not exactly in the mood to play a really long game at the moment.
Deus Ex is actually really long. One of the longer games I've played and definitely longer than KotOR unless you've played it before and know what you're doing.
It's common among the Deus Ex fanbase to feel that the first game "should've" been split into two.