Well in theory I'd like to experience everything. Again, I'm super new to the series so outside of Danganronpa 1, 2, and 3, I'm not sure what else I'd need play/read/do to experience the full arc.
if you need some help i can give you a link that tells in what order you need to play/watch the series
i used that myself and it helped me quite a lot
either way, have fun with the series and enjoy the despair