Aside from getting to play builds of Nova the Squirrel 2 on the real thing, a very big positive to having a SNES flashcart is I get to play *all* of the SNES puzzle games without having to borrow them from my cousin.
Aside from platformers like Kirby Super Star and Yoshi's Island (which themselves were big influences on me), I mostly know the SNES for really great puzzle games. Primarily Tetris Attack and Wario's Woods.