I mean, are you enjoying the Witcher? If yes, then definitely finish that.

Personally I’m a story guy, so I found myself liking Witcher 3 a lot more than GTAV, and was actually pretty disappointed in the latter. GTAV has a habit of being really good at writing character dialog and setting up interesting stories, but being horrible at resolving them, usually ending an interesting plot line over a 2 second “good job,” phone call without any real conclusion. Witcher 3 is a lot better at this.