PC for me. I think visual novels are best suited for PC. They're the easiest to control on PC, they originated on PC, and the experience just feels most right on PC to me. It feels more personal to interact with characters who are right in front of you on the screen. And certainly it's the most comfortable for reading text. Portable consoles are too small, although the portability can be nice occasionally. Home consoles - well, I don't like playing a VN on the big screen nearly as much.