Between the current console generation pulling overtime and the growing pains of digital monetization, I've been less confident about preordering PC games in recent years. Sometimes it's easy to spot the lousy ports with questionable ethics, other times you don't know you've been duped until you're past the point of no return.
Sticking with reputable developers isn't exactly foolproof either. For instance, BioWare earned plenty of praise for Dragon Age: Origin and then hastily shipped a sloppy sequel that disappointed many (most?) fans -- including me. What was the last PC game you preordered? Was it a major upset or did you get your money's worth?