I have to confess, it really, really makes me pissed when other people on the team aren't putting forth the same effort. I'd say I work 40 hours a week at least, counting real actual work, and I'm on a project right now where I think the other person is dragging their feet and making almost zero progress, not communicating, not asking for help, etc. A large part of that is because this person is a little more junior, but I get the feeling they're hiding and not doing what they should be.