The most common bug is a never-ending load screen right after the cinematic intro to the game. Work-arounds include deleting the game and re-installing or just simply reloading the game until it works but that's no permanent work around.
Another bug that has plagued users is a tutorial bug that stops players from progressing early on.
Have you came accross any bugs in The Witcher 3: Wild Hunt? Let us know in the comments below!