Why not give it a shot if we don't try new things it gets boring and if it sucks it's a lesson in the book like I learned never put flaked rye in a milk stout just terrible but then again I also learned in a smash I love Vienna malt without trying new things I would never have learned either of those lessons
Maybe go moderately heavy on biscuit or caramel to give kind of a graham cracker crust flavor. Possibly a golden strong or "blonde" milk stout to balance the creamy mouth feel.
Berries in secondary (or more like dry-hop) to give a fruit topping character.